; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s
;==============================================================================;
; the shift amount is negated (shiftbitwidth - shiftamt)
;==============================================================================;
; shift left
;------------------------------------------------------------------------------;
define i32 @reg32_shl_by_negated(i32 %val, i32 %shamt) nounwind {
; CHECK-LABEL: reg32_shl_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: lsl w0, w0, w8
; CHECK-NEXT: ret
%negshamt = sub i32 32, %shamt
%shifted = shl i32 %val, %negshamt
ret i32 %shifted
}
define i32 @load32_shl_by_negated(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: load32_shl_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: lsl w0, w9, w8
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = shl i32 %val, %negshamt
ret i32 %shifted
}
define void @store32_shl_by_negated(i32 %val, i32* %dstptr, i32 %shamt) nounwind {
; CHECK-LABEL: store32_shl_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w2
; CHECK-NEXT: lsl w8, w0, w8
; CHECK-NEXT: str w8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i32 32, %shamt
%shifted = shl i32 %val, %negshamt
store i32 %shifted, i32* %dstptr
ret void
}
define void @modify32_shl_by_negated(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: modify32_shl_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: lsl w8, w9, w8
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = shl i32 %val, %negshamt
store i32 %shifted, i32* %valptr
ret void
}
define void @modify32_shl_by_negated_multi_use(i32* %valptr, i32 %shamt, i32* %shamtptr) nounwind {
; CHECK-LABEL: modify32_shl_by_negated_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: mov w10, #32
; CHECK-NEXT: lsl w8, w9, w8
; CHECK-NEXT: sub w9, w10, w1
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: str w9, [x2]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = shl i32 %val, %negshamt
store i32 %shifted, i32* %valptr
store i32 %negshamt, i32* %shamtptr
ret void
}
define i64 @reg64_shl_by_negated(i64 %val, i64 %shamt) nounwind {
; CHECK-LABEL: reg64_shl_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: lsl x0, x0, x8
; CHECK-NEXT: ret
%negshamt = sub i64 64, %shamt
%shifted = shl i64 %val, %negshamt
ret i64 %shifted
}
define i64 @load64_shl_by_negated(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: load64_shl_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: lsl x0, x9, x8
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = shl i64 %val, %negshamt
ret i64 %shifted
}
define void @store64_shl_by_negated(i64 %val, i64* %dstptr, i64 %shamt) nounwind {
; CHECK-LABEL: store64_shl_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x2
; CHECK-NEXT: lsl x8, x0, x8
; CHECK-NEXT: str x8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i64 64, %shamt
%shifted = shl i64 %val, %negshamt
store i64 %shifted, i64* %dstptr
ret void
}
define void @modify64_shl_by_negated(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: modify64_shl_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: lsl x8, x9, x8
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = shl i64 %val, %negshamt
store i64 %shifted, i64* %valptr
ret void
}
define void @modify64_shl_by_negated_multi_use(i64* %valptr, i64 %shamt, i64* %shamtptr) nounwind {
; CHECK-LABEL: modify64_shl_by_negated_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: mov w10, #64
; CHECK-NEXT: lsl x8, x9, x8
; CHECK-NEXT: sub x9, x10, x1
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: str x9, [x2]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = shl i64 %val, %negshamt
store i64 %shifted, i64* %valptr
store i64 %negshamt, i64* %shamtptr
ret void
}
; logical shift right
;------------------------------------------------------------------------------;
define i32 @reg32_lshr_by_negated(i32 %val, i32 %shamt) nounwind {
; CHECK-LABEL: reg32_lshr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%negshamt = sub i32 32, %shamt
%shifted = lshr i32 %val, %negshamt
ret i32 %shifted
}
define i32 @load32_lshr_by_negated(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: load32_lshr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: lsr w0, w9, w8
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = lshr i32 %val, %negshamt
ret i32 %shifted
}
define void @store32_lshr_by_negated(i32 %val, i32* %dstptr, i32 %shamt) nounwind {
; CHECK-LABEL: store32_lshr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w2
; CHECK-NEXT: lsr w8, w0, w8
; CHECK-NEXT: str w8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i32 32, %shamt
%shifted = lshr i32 %val, %negshamt
store i32 %shifted, i32* %dstptr
ret void
}
define void @modify32_lshr_by_negated(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: modify32_lshr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: lsr w8, w9, w8
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = lshr i32 %val, %negshamt
store i32 %shifted, i32* %valptr
ret void
}
define void @modify32_lshr_by_negated_multi_use(i32* %valptr, i32 %shamt, i32* %shamtptr) nounwind {
; CHECK-LABEL: modify32_lshr_by_negated_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: mov w10, #32
; CHECK-NEXT: lsr w8, w9, w8
; CHECK-NEXT: sub w9, w10, w1
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: str w9, [x2]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = lshr i32 %val, %negshamt
store i32 %shifted, i32* %valptr
store i32 %negshamt, i32* %shamtptr
ret void
}
define i64 @reg64_lshr_by_negated(i64 %val, i64 %shamt) nounwind {
; CHECK-LABEL: reg64_lshr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%negshamt = sub i64 64, %shamt
%shifted = lshr i64 %val, %negshamt
ret i64 %shifted
}
define i64 @load64_lshr_by_negated(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: load64_lshr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: lsr x0, x9, x8
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = lshr i64 %val, %negshamt
ret i64 %shifted
}
define void @store64_lshr_by_negated(i64 %val, i64* %dstptr, i64 %shamt) nounwind {
; CHECK-LABEL: store64_lshr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x2
; CHECK-NEXT: lsr x8, x0, x8
; CHECK-NEXT: str x8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i64 64, %shamt
%shifted = lshr i64 %val, %negshamt
store i64 %shifted, i64* %dstptr
ret void
}
define void @modify64_lshr_by_negated(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: modify64_lshr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: lsr x8, x9, x8
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = lshr i64 %val, %negshamt
store i64 %shifted, i64* %valptr
ret void
}
define void @modify64_lshr_by_negated_multi_use(i64* %valptr, i64 %shamt, i64* %shamtptr) nounwind {
; CHECK-LABEL: modify64_lshr_by_negated_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: mov w10, #64
; CHECK-NEXT: lsr x8, x9, x8
; CHECK-NEXT: sub x9, x10, x1
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: str x9, [x2]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = lshr i64 %val, %negshamt
store i64 %shifted, i64* %valptr
store i64 %negshamt, i64* %shamtptr
ret void
}
; arithmetic shift right
;------------------------------------------------------------------------------;
define i32 @reg32_ashr_by_negated(i32 %val, i32 %shamt) nounwind {
; CHECK-LABEL: reg32_ashr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: asr w0, w0, w8
; CHECK-NEXT: ret
%negshamt = sub i32 32, %shamt
%shifted = ashr i32 %val, %negshamt
ret i32 %shifted
}
define i32 @load32_ashr_by_negated(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: load32_ashr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: asr w0, w9, w8
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = ashr i32 %val, %negshamt
ret i32 %shifted
}
define void @store32_ashr_by_negated(i32 %val, i32* %dstptr, i32 %shamt) nounwind {
; CHECK-LABEL: store32_ashr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w2
; CHECK-NEXT: asr w8, w0, w8
; CHECK-NEXT: str w8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i32 32, %shamt
%shifted = ashr i32 %val, %negshamt
store i32 %shifted, i32* %dstptr
ret void
}
define void @modify32_ashr_by_negated(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: modify32_ashr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: asr w8, w9, w8
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = ashr i32 %val, %negshamt
store i32 %shifted, i32* %valptr
ret void
}
define void @modify32_ashr_by_negated_multi_use(i32* %valptr, i32 %shamt, i32* %shamtptr) nounwind {
; CHECK-LABEL: modify32_ashr_by_negated_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: mov w10, #32
; CHECK-NEXT: asr w8, w9, w8
; CHECK-NEXT: sub w9, w10, w1
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: str w9, [x2]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 32, %shamt
%shifted = ashr i32 %val, %negshamt
store i32 %shifted, i32* %valptr
store i32 %negshamt, i32* %shamtptr
ret void
}
define i64 @reg64_ashr_by_negated(i64 %val, i64 %shamt) nounwind {
; CHECK-LABEL: reg64_ashr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: asr x0, x0, x8
; CHECK-NEXT: ret
%negshamt = sub i64 64, %shamt
%shifted = ashr i64 %val, %negshamt
ret i64 %shifted
}
define i64 @load64_ashr_by_negated(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: load64_ashr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: asr x0, x9, x8
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = ashr i64 %val, %negshamt
ret i64 %shifted
}
define void @store64_ashr_by_negated(i64 %val, i64* %dstptr, i64 %shamt) nounwind {
; CHECK-LABEL: store64_ashr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x2
; CHECK-NEXT: asr x8, x0, x8
; CHECK-NEXT: str x8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i64 64, %shamt
%shifted = ashr i64 %val, %negshamt
store i64 %shifted, i64* %dstptr
ret void
}
define void @modify64_ashr_by_negated(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: modify64_ashr_by_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: asr x8, x9, x8
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = ashr i64 %val, %negshamt
store i64 %shifted, i64* %valptr
ret void
}
define void @modify64_ashr_by_negated_multi_use(i64* %valptr, i64 %shamt, i64* %shamtptr) nounwind {
; CHECK-LABEL: modify64_ashr_by_negated_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: mov w10, #64
; CHECK-NEXT: asr x8, x9, x8
; CHECK-NEXT: sub x9, x10, x1
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: str x9, [x2]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 64, %shamt
%shifted = ashr i64 %val, %negshamt
store i64 %shifted, i64* %valptr
store i64 %negshamt, i64* %shamtptr
ret void
}
;==============================================================================;
; the shift amount is complemented (shiftbitwidth - 1 - shiftamt)
;==============================================================================;
; shift left
;------------------------------------------------------------------------------;
define i32 @reg32_shl_by_complemented(i32 %val, i32 %shamt) nounwind {
; CHECK-LABEL: reg32_shl_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: lsl w0, w0, w8
; CHECK-NEXT: ret
%negshamt = sub i32 31, %shamt
%shifted = shl i32 %val, %negshamt
ret i32 %shifted
}
define i32 @load32_shl_by_complemented(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: load32_shl_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: lsl w0, w9, w8
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = shl i32 %val, %negshamt
ret i32 %shifted
}
define void @store32_shl_by_complemented(i32 %val, i32* %dstptr, i32 %shamt) nounwind {
; CHECK-LABEL: store32_shl_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w2
; CHECK-NEXT: lsl w8, w0, w8
; CHECK-NEXT: str w8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i32 31, %shamt
%shifted = shl i32 %val, %negshamt
store i32 %shifted, i32* %dstptr
ret void
}
define void @modify32_shl_by_complemented(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: modify32_shl_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: lsl w8, w9, w8
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = shl i32 %val, %negshamt
store i32 %shifted, i32* %valptr
ret void
}
define void @modify32_shl_by_complemented_multi_use(i32* %valptr, i32 %shamt, i32* %shamtptr) nounwind {
; CHECK-LABEL: modify32_shl_by_complemented_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: mov w10, #31
; CHECK-NEXT: lsl w8, w9, w8
; CHECK-NEXT: sub w9, w10, w1
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: str w9, [x2]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = shl i32 %val, %negshamt
store i32 %shifted, i32* %valptr
store i32 %negshamt, i32* %shamtptr
ret void
}
define i64 @reg64_shl_by_complemented(i64 %val, i64 %shamt) nounwind {
; CHECK-LABEL: reg64_shl_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: lsl x0, x0, x8
; CHECK-NEXT: ret
%negshamt = sub i64 63, %shamt
%shifted = shl i64 %val, %negshamt
ret i64 %shifted
}
define i64 @load64_shl_by_complemented(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: load64_shl_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: lsl x0, x9, x8
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = shl i64 %val, %negshamt
ret i64 %shifted
}
define void @store64_shl_by_complemented(i64 %val, i64* %dstptr, i64 %shamt) nounwind {
; CHECK-LABEL: store64_shl_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x2
; CHECK-NEXT: lsl x8, x0, x8
; CHECK-NEXT: str x8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i64 63, %shamt
%shifted = shl i64 %val, %negshamt
store i64 %shifted, i64* %dstptr
ret void
}
define void @modify64_shl_by_complemented(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: modify64_shl_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: lsl x8, x9, x8
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = shl i64 %val, %negshamt
store i64 %shifted, i64* %valptr
ret void
}
define void @modify64_shl_by_complemented_multi_use(i64* %valptr, i64 %shamt, i64* %shamtptr) nounwind {
; CHECK-LABEL: modify64_shl_by_complemented_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: mov w10, #63
; CHECK-NEXT: lsl x8, x9, x8
; CHECK-NEXT: sub x9, x10, x1
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: str x9, [x2]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = shl i64 %val, %negshamt
store i64 %shifted, i64* %valptr
store i64 %negshamt, i64* %shamtptr
ret void
}
; logical shift right
;------------------------------------------------------------------------------;
define i32 @reg32_lshr_by_complemented(i32 %val, i32 %shamt) nounwind {
; CHECK-LABEL: reg32_lshr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%negshamt = sub i32 31, %shamt
%shifted = lshr i32 %val, %negshamt
ret i32 %shifted
}
define i32 @load32_lshr_by_complemented(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: load32_lshr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: lsr w0, w9, w8
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = lshr i32 %val, %negshamt
ret i32 %shifted
}
define void @store32_lshr_by_complemented(i32 %val, i32* %dstptr, i32 %shamt) nounwind {
; CHECK-LABEL: store32_lshr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w2
; CHECK-NEXT: lsr w8, w0, w8
; CHECK-NEXT: str w8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i32 31, %shamt
%shifted = lshr i32 %val, %negshamt
store i32 %shifted, i32* %dstptr
ret void
}
define void @modify32_lshr_by_complemented(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: modify32_lshr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: lsr w8, w9, w8
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = lshr i32 %val, %negshamt
store i32 %shifted, i32* %valptr
ret void
}
define void @modify32_lshr_by_complemented_multi_use(i32* %valptr, i32 %shamt, i32* %shamtptr) nounwind {
; CHECK-LABEL: modify32_lshr_by_complemented_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: mov w10, #31
; CHECK-NEXT: lsr w8, w9, w8
; CHECK-NEXT: sub w9, w10, w1
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: str w9, [x2]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = lshr i32 %val, %negshamt
store i32 %shifted, i32* %valptr
store i32 %negshamt, i32* %shamtptr
ret void
}
define i64 @reg64_lshr_by_complemented(i64 %val, i64 %shamt) nounwind {
; CHECK-LABEL: reg64_lshr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%negshamt = sub i64 63, %shamt
%shifted = lshr i64 %val, %negshamt
ret i64 %shifted
}
define i64 @load64_lshr_by_complemented(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: load64_lshr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: lsr x0, x9, x8
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = lshr i64 %val, %negshamt
ret i64 %shifted
}
define void @store64_lshr_by_complemented(i64 %val, i64* %dstptr, i64 %shamt) nounwind {
; CHECK-LABEL: store64_lshr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x2
; CHECK-NEXT: lsr x8, x0, x8
; CHECK-NEXT: str x8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i64 63, %shamt
%shifted = lshr i64 %val, %negshamt
store i64 %shifted, i64* %dstptr
ret void
}
define void @modify64_lshr_by_complemented(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: modify64_lshr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: lsr x8, x9, x8
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = lshr i64 %val, %negshamt
store i64 %shifted, i64* %valptr
ret void
}
define void @modify64_lshr_by_complemented_multi_use(i64* %valptr, i64 %shamt, i64* %shamtptr) nounwind {
; CHECK-LABEL: modify64_lshr_by_complemented_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: mov w10, #63
; CHECK-NEXT: lsr x8, x9, x8
; CHECK-NEXT: sub x9, x10, x1
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: str x9, [x2]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = lshr i64 %val, %negshamt
store i64 %shifted, i64* %valptr
store i64 %negshamt, i64* %shamtptr
ret void
}
; arithmetic shift right
;------------------------------------------------------------------------------;
define i32 @reg32_ashr_by_complemented(i32 %val, i32 %shamt) nounwind {
; CHECK-LABEL: reg32_ashr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: asr w0, w0, w8
; CHECK-NEXT: ret
%negshamt = sub i32 31, %shamt
%shifted = ashr i32 %val, %negshamt
ret i32 %shifted
}
define i32 @load32_ashr_by_complemented(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: load32_ashr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: asr w0, w9, w8
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = ashr i32 %val, %negshamt
ret i32 %shifted
}
define void @store32_ashr_by_complemented(i32 %val, i32* %dstptr, i32 %shamt) nounwind {
; CHECK-LABEL: store32_ashr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w2
; CHECK-NEXT: asr w8, w0, w8
; CHECK-NEXT: str w8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i32 31, %shamt
%shifted = ashr i32 %val, %negshamt
store i32 %shifted, i32* %dstptr
ret void
}
define void @modify32_ashr_by_complemented(i32* %valptr, i32 %shamt) nounwind {
; CHECK-LABEL: modify32_ashr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: asr w8, w9, w8
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = ashr i32 %val, %negshamt
store i32 %shifted, i32* %valptr
ret void
}
define void @modify32_ashr_by_complemented_multi_use(i32* %valptr, i32 %shamt, i32* %shamtptr) nounwind {
; CHECK-LABEL: modify32_ashr_by_complemented_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn w8, w1
; CHECK-NEXT: ldr w9, [x0]
; CHECK-NEXT: mov w10, #31
; CHECK-NEXT: asr w8, w9, w8
; CHECK-NEXT: sub w9, w10, w1
; CHECK-NEXT: str w8, [x0]
; CHECK-NEXT: str w9, [x2]
; CHECK-NEXT: ret
%val = load i32, i32* %valptr
%negshamt = sub i32 31, %shamt
%shifted = ashr i32 %val, %negshamt
store i32 %shifted, i32* %valptr
store i32 %negshamt, i32* %shamtptr
ret void
}
define i64 @reg64_ashr_by_complemented(i64 %val, i64 %shamt) nounwind {
; CHECK-LABEL: reg64_ashr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: asr x0, x0, x8
; CHECK-NEXT: ret
%negshamt = sub i64 63, %shamt
%shifted = ashr i64 %val, %negshamt
ret i64 %shifted
}
define i64 @load64_ashr_by_complemented(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: load64_ashr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: asr x0, x9, x8
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = ashr i64 %val, %negshamt
ret i64 %shifted
}
define void @store64_ashr_by_complemented(i64 %val, i64* %dstptr, i64 %shamt) nounwind {
; CHECK-LABEL: store64_ashr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x2
; CHECK-NEXT: asr x8, x0, x8
; CHECK-NEXT: str x8, [x1]
; CHECK-NEXT: ret
%negshamt = sub i64 63, %shamt
%shifted = ashr i64 %val, %negshamt
store i64 %shifted, i64* %dstptr
ret void
}
define void @modify64_ashr_by_complemented(i64* %valptr, i64 %shamt) nounwind {
; CHECK-LABEL: modify64_ashr_by_complemented:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: asr x8, x9, x8
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = ashr i64 %val, %negshamt
store i64 %shifted, i64* %valptr
ret void
}
define void @modify64_ashr_by_complemented_multi_use(i64* %valptr, i64 %shamt, i64* %shamtptr) nounwind {
; CHECK-LABEL: modify64_ashr_by_complemented_multi_use:
; CHECK: // %bb.0:
; CHECK-NEXT: mvn x8, x1
; CHECK-NEXT: ldr x9, [x0]
; CHECK-NEXT: mov w10, #63
; CHECK-NEXT: asr x8, x9, x8
; CHECK-NEXT: sub x9, x10, x1
; CHECK-NEXT: str x8, [x0]
; CHECK-NEXT: str x9, [x2]
; CHECK-NEXT: ret
%val = load i64, i64* %valptr
%negshamt = sub i64 63, %shamt
%shifted = ashr i64 %val, %negshamt
store i64 %shifted, i64* %valptr
store i64 %negshamt, i64* %shamtptr
ret void
}
;||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||;
; next let's only test simple reg pattern, and only lshr.
;||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||;
;==============================================================================;
; subtraction from negated shift amount
define i32 @reg32_lshr_by_sub_from_negated(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_sub_from_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: add w8, w1, w2
; CHECK-NEXT: neg w8, w8
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 32, %a
%negasubb = sub i32 %nega, %b
%shifted = lshr i32 %val, %negasubb
ret i32 %shifted
}
define i64 @reg64_lshr_by_sub_from_negated(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_sub_from_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: add x8, x1, x2
; CHECK-NEXT: neg x8, x8
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 64, %a
%negasubb = sub i64 %nega, %b
%shifted = lshr i64 %val, %negasubb
ret i64 %shifted
}
;==============================================================================;
; subtraction of negated shift amount
define i32 @reg32_lshr_by_sub_of_negated(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_sub_of_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: add w8, w1, w2
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 32, %a
%negasubb = sub i32 %b, %nega
%shifted = lshr i32 %val, %negasubb
ret i32 %shifted
}
define i64 @reg64_lshr_by_sub_of_negated(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_sub_of_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: add x8, x1, x2
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 64, %a
%negasubb = sub i64 %b, %nega
%shifted = lshr i64 %val, %negasubb
ret i64 %shifted
}
;==============================================================================;
; add to negated shift amount
;
define i32 @reg32_lshr_by_add_to_negated(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_add_to_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: sub w8, w2, w1
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 32, %a
%negasubb = add i32 %nega, %b
%shifted = lshr i32 %val, %negasubb
ret i32 %shifted
}
define i64 @reg64_lshr_by_add_to_negated(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_add_to_negated:
; CHECK: // %bb.0:
; CHECK-NEXT: sub x8, x2, x1
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 64, %a
%negasubb = add i64 %nega, %b
%shifted = lshr i64 %val, %negasubb
ret i64 %shifted
}
;==============================================================================;
; subtraction of negated shift amounts
define i32 @reg32_lshr_by_sub_of_negated_amts(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_sub_of_negated_amts:
; CHECK: // %bb.0:
; CHECK-NEXT: sub w8, w2, w1
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 32, %a
%negb = sub i32 32, %b
%negasubnegb = sub i32 %nega, %negb
%shifted = lshr i32 %val, %negasubnegb
ret i32 %shifted
}
define i64 @reg64_lshr_by_sub_of_negated_amts(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_sub_of_negated_amts:
; CHECK: // %bb.0:
; CHECK-NEXT: sub x8, x2, x1
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 64, %a
%negb = sub i64 64, %b
%negasubnegb = sub i64 %nega, %negb
%shifted = lshr i64 %val, %negasubnegb
ret i64 %shifted
}
;==============================================================================;
; addition of negated shift amounts
define i32 @reg32_lshr_by_add_of_negated_amts(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_add_of_negated_amts:
; CHECK: // %bb.0:
; CHECK-NEXT: add w8, w1, w2
; CHECK-NEXT: neg w8, w8
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 32, %a
%negb = sub i32 32, %b
%negasubnegb = add i32 %nega, %negb
%shifted = lshr i32 %val, %negasubnegb
ret i32 %shifted
}
define i64 @reg64_lshr_by_add_of_negated_amts(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_add_of_negated_amts:
; CHECK: // %bb.0:
; CHECK-NEXT: add x8, x1, x2
; CHECK-NEXT: neg x8, x8
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 64, %a
%negb = sub i64 64, %b
%negasubnegb = add i64 %nega, %negb
%shifted = lshr i64 %val, %negasubnegb
ret i64 %shifted
}
;==============================================================================;
; and patterns with an actual negation+addition
define i32 @reg32_lshr_by_negated_unfolded(i32 %val, i32 %shamt) nounwind {
; CHECK-LABEL: reg32_lshr_by_negated_unfolded:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%negshamt = sub i32 0, %shamt
%negaaddbitwidth = add i32 %negshamt, 32
%shifted = lshr i32 %val, %negaaddbitwidth
ret i32 %shifted
}
define i64 @reg64_lshr_by_negated_unfolded(i64 %val, i64 %shamt) nounwind {
; CHECK-LABEL: reg64_lshr_by_negated_unfolded:
; CHECK: // %bb.0:
; CHECK-NEXT: neg x8, x1
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%negshamt = sub i64 0, %shamt
%negaaddbitwidth = add i64 %negshamt, 64
%shifted = lshr i64 %val, %negaaddbitwidth
ret i64 %shifted
}
define i32 @reg32_lshr_by_negated_unfolded_sub_b(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_negated_unfolded_sub_b:
; CHECK: // %bb.0:
; CHECK-NEXT: add w8, w1, w2
; CHECK-NEXT: neg w8, w8
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 0, %a
%negaaddbitwidth = add i32 %nega, 32
%negaaddbitwidthsubb = sub i32 %negaaddbitwidth, %b
%shifted = lshr i32 %val, %negaaddbitwidthsubb
ret i32 %shifted
}
define i64 @reg64_lshr_by_negated_unfolded_sub_b(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_negated_unfolded_sub_b:
; CHECK: // %bb.0:
; CHECK-NEXT: add x8, x1, x2
; CHECK-NEXT: neg x8, x8
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 0, %a
%negaaddbitwidth = add i64 %nega, 64
%negaaddbitwidthsubb = sub i64 %negaaddbitwidth, %b
%shifted = lshr i64 %val, %negaaddbitwidthsubb
ret i64 %shifted
}
define i32 @reg32_lshr_by_b_sub_negated_unfolded(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_b_sub_negated_unfolded:
; CHECK: // %bb.0:
; CHECK-NEXT: add w8, w2, w1
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 0, %a
%negaaddbitwidth = add i32 %nega, 32
%negaaddbitwidthsubb = sub i32 %b, %negaaddbitwidth
%shifted = lshr i32 %val, %negaaddbitwidthsubb
ret i32 %shifted
}
define i64 @reg64_lshr_by_b_sub_negated_unfolded(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_b_sub_negated_unfolded:
; CHECK: // %bb.0:
; CHECK-NEXT: add x8, x2, x1
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 0, %a
%negaaddbitwidth = add i64 %nega, 64
%negaaddbitwidthsubb = sub i64 %b, %negaaddbitwidth
%shifted = lshr i64 %val, %negaaddbitwidthsubb
ret i64 %shifted
}
define i32 @reg32_lshr_by_negated_unfolded_add_b(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_negated_unfolded_add_b:
; CHECK: // %bb.0:
; CHECK-NEXT: sub w8, w2, w1
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 0, %a
%negaaddbitwidth = add i32 %nega, 32
%negaaddbitwidthaddb = add i32 %negaaddbitwidth, %b
%shifted = lshr i32 %val, %negaaddbitwidthaddb
ret i32 %shifted
}
define i64 @reg64_lshr_by_negated_unfolded_add_b(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_negated_unfolded_add_b:
; CHECK: // %bb.0:
; CHECK-NEXT: sub x8, x2, x1
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 0, %a
%negaaddbitwidth = add i64 %nega, 64
%negaaddbitwidthaddb = add i64 %negaaddbitwidth, %b
%shifted = lshr i64 %val, %negaaddbitwidthaddb
ret i64 %shifted
}
;==============================================================================;
; and patterns with an actual negation+mask
define i32 @reg32_lshr_by_masked_negated_unfolded(i32 %val, i32 %shamt) nounwind {
; CHECK-LABEL: reg32_lshr_by_masked_negated_unfolded:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%negshamt = sub i32 0, %shamt
%negaaddbitwidth = and i32 %negshamt, 31
%shifted = lshr i32 %val, %negaaddbitwidth
ret i32 %shifted
}
define i64 @reg64_lshr_by_masked_negated_unfolded(i64 %val, i64 %shamt) nounwind {
; CHECK-LABEL: reg64_lshr_by_masked_negated_unfolded:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%negshamt = sub i64 0, %shamt
%negaaddbitwidth = and i64 %negshamt, 63
%shifted = lshr i64 %val, %negaaddbitwidth
ret i64 %shifted
}
define i32 @reg32_lshr_by_masked_negated_unfolded_sub_b(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_masked_negated_unfolded_sub_b:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: and w8, w8, #0x1f
; CHECK-NEXT: sub w8, w8, w2
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 0, %a
%negaaddbitwidth = and i32 %nega, 31
%negaaddbitwidthsubb = sub i32 %negaaddbitwidth, %b
%shifted = lshr i32 %val, %negaaddbitwidthsubb
ret i32 %shifted
}
define i64 @reg64_lshr_by_masked_negated_unfolded_sub_b(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_masked_negated_unfolded_sub_b:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: and x8, x8, #0x3f
; CHECK-NEXT: sub x8, x8, x2
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 0, %a
%negaaddbitwidth = and i64 %nega, 63
%negaaddbitwidthsubb = sub i64 %negaaddbitwidth, %b
%shifted = lshr i64 %val, %negaaddbitwidthsubb
ret i64 %shifted
}
define i32 @reg32_lshr_by_masked_b_sub_negated_unfolded(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_masked_b_sub_negated_unfolded:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: and w8, w8, #0x1f
; CHECK-NEXT: sub w8, w2, w8
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 0, %a
%negaaddbitwidth = and i32 %nega, 31
%negaaddbitwidthsubb = sub i32 %b, %negaaddbitwidth
%shifted = lshr i32 %val, %negaaddbitwidthsubb
ret i32 %shifted
}
define i64 @reg64_lshr_by_masked_b_sub_negated_unfolded(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_masked_b_sub_negated_unfolded:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: and x8, x8, #0x3f
; CHECK-NEXT: sub x8, x2, x8
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 0, %a
%negaaddbitwidth = and i64 %nega, 63
%negaaddbitwidthsubb = sub i64 %b, %negaaddbitwidth
%shifted = lshr i64 %val, %negaaddbitwidthsubb
ret i64 %shifted
}
define i32 @reg32_lshr_by_masked_negated_unfolded_add_b(i32 %val, i32 %a, i32 %b) nounwind {
; CHECK-LABEL: reg32_lshr_by_masked_negated_unfolded_add_b:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: and w8, w8, #0x1f
; CHECK-NEXT: add w8, w8, w2
; CHECK-NEXT: lsr w0, w0, w8
; CHECK-NEXT: ret
%nega = sub i32 0, %a
%negaaddbitwidth = and i32 %nega, 31
%negaaddbitwidthaddb = add i32 %negaaddbitwidth, %b
%shifted = lshr i32 %val, %negaaddbitwidthaddb
ret i32 %shifted
}
define i64 @reg64_lshr_by_masked_negated_unfolded_add_b(i64 %val, i64 %a, i64 %b) nounwind {
; CHECK-LABEL: reg64_lshr_by_masked_negated_unfolded_add_b:
; CHECK: // %bb.0:
; CHECK-NEXT: neg w8, w1
; CHECK-NEXT: and x8, x8, #0x3f
; CHECK-NEXT: add x8, x8, x2
; CHECK-NEXT: lsr x0, x0, x8
; CHECK-NEXT: ret
%nega = sub i64 0, %a
%negaaddbitwidth = and i64 %nega, 63
%negaaddbitwidthaddb = add i64 %negaaddbitwidth, %b
%shifted = lshr i64 %val, %negaaddbitwidthaddb
ret i64 %shifted
}
define i32 @t(i64 %x) {
; CHECK-LABEL: t:
; CHECK: // %bb.0:
; CHECK-NEXT: ubfx x0, x0, #17, #28
; CHECK-NEXT: // kill: def $w0 killed $w0 killed $x0
; CHECK-NEXT: ret
%s = lshr i64 %x, 13
%t = trunc i64 %s to i32
%r = lshr i32 %t, 4
ret i32 %r
}