; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-attributes
; RUN: opt < %s -basic-aa -tbaa -licm -S | FileCheck %s
; RUN: opt -aa-pipeline=tbaa,basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' -S %s | FileCheck %s
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
@X = global i32 7 ; <i32*> [#uses=4]
define void @test1(i32 %i) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: Entry:
; CHECK-NEXT: [[X_PROMOTED:%.*]] = load i32, i32* @X, align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: Loop:
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[X_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[X2]] = add i32 [[X21]], 1
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[OUT:%.*]], label [[LOOP]]
; CHECK: Out:
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* @X, align 4
; CHECK-NEXT: ret void
;
Entry:
br label %Loop
Loop: ; preds = %Loop, %0
%j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
%x = load i32, i32* @X ; <i32> [#uses=1]
%x2 = add i32 %x, 1 ; <i32> [#uses=1]
store i32 %x2, i32* @X
%Next = add i32 %j, 1 ; <i32> [#uses=2]
%cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
br i1 %cond, label %Out, label %Loop
Out:
ret void
}
define void @test2(i32 %i) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: Entry:
; CHECK-NEXT: [[DOTPROMOTED:%.*]] = load i32, i32* getelementptr inbounds (i32, i32* @X, i64 1), align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: Loop:
; CHECK-NEXT: [[V1:%.*]] = phi i32 [ [[V:%.*]], [[LOOP]] ], [ [[DOTPROMOTED]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[V]] = add i32 [[V1]], 1
; CHECK-NEXT: br i1 false, label [[LOOP]], label [[EXIT:%.*]]
; CHECK: Exit:
; CHECK-NEXT: [[V_LCSSA:%.*]] = phi i32 [ [[V]], [[LOOP]] ]
; CHECK-NEXT: store i32 [[V_LCSSA]], i32* getelementptr inbounds (i32, i32* @X, i64 1), align 4
; CHECK-NEXT: ret void
;
Entry:
br label %Loop
Loop: ; preds = %Loop, %0
%X1 = getelementptr i32, i32* @X, i64 1 ; <i32*> [#uses=1]
%A = load i32, i32* %X1 ; <i32> [#uses=1]
%V = add i32 %A, 1 ; <i32> [#uses=1]
%X2 = getelementptr i32, i32* @X, i64 1 ; <i32*> [#uses=1]
store i32 %V, i32* %X2
br i1 false, label %Loop, label %Exit
Exit: ; preds = %Loop
ret void
}
define void @test3(i32 %i) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: Loop:
; CHECK-NEXT: [[X:%.*]] = load volatile i32, i32* @X, align 4
; CHECK-NEXT: [[X2:%.*]] = add i32 [[X]], 1
; CHECK-NEXT: store i32 [[X2]], i32* @X, align 4
; CHECK-NEXT: br i1 true, label [[OUT:%.*]], label [[LOOP]]
; CHECK: Out:
; CHECK-NEXT: ret void
;
br label %Loop
Loop:
; Should not promote this to a register
%x = load volatile i32, i32* @X
%x2 = add i32 %x, 1
store i32 %x2, i32* @X
br i1 true, label %Out, label %Loop
Out: ; preds = %Loop
ret void
}
; Should not promote this to a register
define void @test3b(i32 %i) {
; CHECK-LABEL: @test3b(
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: Loop:
; CHECK-NEXT: [[X:%.*]] = load i32, i32* @X, align 4
; CHECK-NEXT: [[X2:%.*]] = add i32 [[X]], 1
; CHECK-NEXT: store volatile i32 [[X2]], i32* @X, align 4
; CHECK-NEXT: br i1 true, label [[OUT:%.*]], label [[LOOP]]
; CHECK: Out:
; CHECK-NEXT: ret void
;
br label %Loop
Loop:
%x = load i32, i32* @X
%x2 = add i32 %x, 1
store volatile i32 %x2, i32* @X
br i1 true, label %Out, label %Loop
Out: ; preds = %Loop
ret void
}
; PR8041
; Should have promoted 'handle2' accesses.
; Should not have promoted offsetx1 loads.
define void @test4(i8* %x, i8 %n) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[HANDLE1:%.*]] = alloca i8*, align 8
; CHECK-NEXT: [[HANDLE2:%.*]] = alloca i8*, align 8
; CHECK-NEXT: store i8* [[X:%.*]], i8** [[HANDLE1]], align 8
; CHECK-NEXT: [[TMP:%.*]] = getelementptr i8, i8* [[X]], i64 8
; CHECK-NEXT: [[OFFSETX1:%.*]] = load i8*, i8** [[HANDLE1]], align 8
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: br label [[SUBLOOP:%.*]]
; CHECK: subloop:
; CHECK-NEXT: [[NEWOFFSETX21:%.*]] = phi i8* [ [[TMP]], [[LOOP]] ], [ [[NEWOFFSETX2:%.*]], [[SUBLOOP]] ]
; CHECK-NEXT: [[COUNT:%.*]] = phi i8 [ 0, [[LOOP]] ], [ [[NEXTCOUNT:%.*]], [[SUBLOOP]] ]
; CHECK-NEXT: store i8 [[N:%.*]], i8* [[NEWOFFSETX21]], align 1
; CHECK-NEXT: [[NEWOFFSETX2]] = getelementptr i8, i8* [[NEWOFFSETX21]], i64 -1
; CHECK-NEXT: [[NEXTCOUNT]] = add i8 [[COUNT]], 1
; CHECK-NEXT: [[INNEREXITCOND:%.*]] = icmp sge i8 [[NEXTCOUNT]], 8
; CHECK-NEXT: br i1 [[INNEREXITCOND]], label [[INNEREXIT:%.*]], label [[SUBLOOP]]
; CHECK: innerexit:
; CHECK-NEXT: [[NEWOFFSETX2_LCSSA:%.*]] = phi i8* [ [[NEWOFFSETX2]], [[SUBLOOP]] ]
; CHECK-NEXT: [[VAL:%.*]] = load i8, i8* [[OFFSETX1]], align 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i8 [[VAL]], [[N]]
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[NEWOFFSETX2_LCSSA_LCSSA:%.*]] = phi i8* [ [[NEWOFFSETX2_LCSSA]], [[INNEREXIT]] ]
; CHECK-NEXT: store i8* [[NEWOFFSETX2_LCSSA_LCSSA]], i8** [[HANDLE2]], align 8
; CHECK-NEXT: ret void
;
%handle1 = alloca i8*
%handle2 = alloca i8*
store i8* %x, i8** %handle1
br label %loop
loop:
%tmp = getelementptr i8, i8* %x, i64 8
store i8* %tmp, i8** %handle2
br label %subloop
subloop:
%count = phi i8 [ 0, %loop ], [ %nextcount, %subloop ]
%offsetx2 = load i8*, i8** %handle2
store i8 %n, i8* %offsetx2
%newoffsetx2 = getelementptr i8, i8* %offsetx2, i64 -1
store i8* %newoffsetx2, i8** %handle2
%nextcount = add i8 %count, 1
%innerexitcond = icmp sge i8 %nextcount, 8
br i1 %innerexitcond, label %innerexit, label %subloop
innerexit:
%offsetx1 = load i8*, i8** %handle1
%val = load i8, i8* %offsetx1
%cond = icmp eq i8 %val, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @test5(i32 %i, i32** noalias %P2) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: Entry:
; CHECK-NEXT: [[X_PROMOTED:%.*]] = load i32, i32* @X, align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: Loop:
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[X_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[X2]] = add i32 [[X21]], 1
; CHECK-NEXT: store atomic i32* @X, i32** [[P2:%.*]] monotonic, align 8
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[OUT:%.*]], label [[LOOP]]
; CHECK: Out:
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* @X, align 4
; CHECK-NEXT: ret void
;
Entry:
br label %Loop
Loop: ; preds = %Loop, %0
%j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
%x = load i32, i32* @X ; <i32> [#uses=1]
%x2 = add i32 %x, 1 ; <i32> [#uses=1]
store i32 %x2, i32* @X
store atomic i32* @X, i32** %P2 monotonic, align 8
%Next = add i32 %j, 1 ; <i32> [#uses=2]
%cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
br i1 %cond, label %Out, label %Loop
Out:
ret void
}
; PR14753 - Preserve TBAA tags when promoting values in a loop.
define void @test6(i32 %n, float* nocapture %a, i32* %gi) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i32 0, i32* [[GI:%.*]], align 4, !tbaa [[TBAA0:![0-9]+]]
; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 0, [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.lr.ph:
; CHECK-NEXT: [[GI_PROMOTED:%.*]] = load i32, i32* [[GI]], align 4, !tbaa [[TBAA0]]
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[INC1:%.*]] = phi i32 [ [[GI_PROMOTED]], [[FOR_BODY_LR_PH]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: [[STOREMERGE2:%.*]] = phi i32 [ 0, [[FOR_BODY_LR_PH]] ], [ [[INC]], [[FOR_BODY]] ]
; CHECK-NEXT: [[IDXPROM:%.*]] = sext i32 [[STOREMERGE2]] to i64
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds float, float* [[A:%.*]], i64 [[IDXPROM]]
; CHECK-NEXT: store float 0.000000e+00, float* [[ARRAYIDX]], align 4, !tbaa [[TBAA4:![0-9]+]]
; CHECK-NEXT: [[INC]] = add nsw i32 [[INC1]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_FOR_END_CRIT_EDGE:%.*]]
; CHECK: for.cond.for.end_crit_edge:
; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY]] ]
; CHECK-NEXT: store i32 [[INC_LCSSA]], i32* [[GI]], align 4, !tbaa [[TBAA0]]
; CHECK-NEXT: br label [[FOR_END]]
; CHECK: for.end:
; CHECK-NEXT: ret void
;
entry:
store i32 0, i32* %gi, align 4, !tbaa !0
%cmp1 = icmp slt i32 0, %n
br i1 %cmp1, label %for.body.lr.ph, label %for.end
for.body.lr.ph: ; preds = %entry
br label %for.body
for.body: ; preds = %for.body.lr.ph, %for.body
%storemerge2 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
%idxprom = sext i32 %storemerge2 to i64
%arrayidx = getelementptr inbounds float, float* %a, i64 %idxprom
store float 0.000000e+00, float* %arrayidx, align 4, !tbaa !3
%0 = load i32, i32* %gi, align 4, !tbaa !0
%inc = add nsw i32 %0, 1
store i32 %inc, i32* %gi, align 4, !tbaa !0
%cmp = icmp slt i32 %inc, %n
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
for.cond.for.end_crit_edge: ; preds = %for.body
br label %for.end
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
ret void
}
declare i32 @opaque(i32) argmemonly
declare void @capture(i32*)
; We can promote even if opaque may throw.
define i32 @test7() {
; CHECK-LABEL: @test7(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
; CHECK-NEXT: [[LOCAL_PROMOTED:%.*]] = load i32, i32* [[LOCAL]], align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[LOCAL_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[X2]] = call i32 @opaque(i32 [[X21]])
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* [[LOCAL]], align 4
; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[LOCAL]], align 4
; CHECK-NEXT: ret i32 [[RET]]
;
entry:
%local = alloca i32
call void @capture(i32* %local)
br label %loop
loop:
%j = phi i32 [ 0, %entry ], [ %next, %loop ]
%x = load i32, i32* %local
%x2 = call i32 @opaque(i32 %x) ; Note this does not capture %local
store i32 %x2, i32* %local
%next = add i32 %j, 1
%cond = icmp eq i32 %next, 0
br i1 %cond, label %exit, label %loop
exit:
%ret = load i32, i32* %local
ret i32 %ret
}
; Hoist the load even if we cannot sink the store, since the store is really
; control-flow dependent.
define i32 @test7bad() {
; CHECK-LABEL: @test7bad(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
; CHECK-NEXT: [[LOCAL_PROMOTED:%.*]] = load i32, i32* [[LOCAL]], align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[X22:%.*]] = phi i32 [ [[LOCAL_PROMOTED]], [[ENTRY:%.*]] ], [ [[X21:%.*]], [[ELSE:%.*]] ]
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[ELSE]] ]
; CHECK-NEXT: [[X2:%.*]] = call i32 @opaque(i32 [[X22]])
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X2]], 0
; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[ELSE]]
; CHECK: if:
; CHECK-NEXT: store i32 [[X2]], i32* [[LOCAL]], align 4
; CHECK-NEXT: br label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: [[X21]] = phi i32 [ [[X2]], [[IF]] ], [ [[X22]], [[LOOP]] ]
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[LOCAL]], align 4
; CHECK-NEXT: ret i32 [[RET]]
;
entry:
%local = alloca i32
call void @capture(i32* %local)
br label %loop
loop:
%j = phi i32 [ 0, %entry ], [ %next, %else ]
%x = load i32, i32* %local
%x2 = call i32 @opaque(i32 %x) ; Note this does not capture %local
%cmp = icmp eq i32 %x2, 0
br i1 %cmp, label %if, label %else
if:
store i32 %x2, i32* %local
br label %else
else:
%next = add i32 %j, 1
%cond = icmp eq i32 %next, 0
br i1 %cond, label %exit, label %loop
exit:
%ret = load i32, i32* %local
ret i32 %ret
}
; Even if neither the load nor the store or guaranteed to execute because
; opaque() may throw, we can still promote - the load not being guaranteed
; doesn't block us, because %local is always dereferenceable.
define i32 @test8() {
; CHECK-LABEL: @test8(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
; CHECK-NEXT: [[LOCAL_PROMOTED:%.*]] = load i32, i32* [[LOCAL]], align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[LOCAL_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[THROWAWAY:%.*]] = call i32 @opaque(i32 [[J]])
; CHECK-NEXT: [[X2]] = call i32 @opaque(i32 [[X21]])
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* [[LOCAL]], align 4
; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[LOCAL]], align 4
; CHECK-NEXT: ret i32 [[RET]]
;
entry:
%local = alloca i32
call void @capture(i32* %local)
br label %loop
loop:
%j = phi i32 [ 0, %entry ], [ %next, %loop ]
%throwaway = call i32 @opaque(i32 %j)
%x = load i32, i32* %local
%x2 = call i32 @opaque(i32 %x)
store i32 %x2, i32* %local
%next = add i32 %j, 1
%cond = icmp eq i32 %next, 0
br i1 %cond, label %exit, label %loop
exit:
%ret = load i32, i32* %local
ret i32 %ret
}
; If the store is "guaranteed modulo exceptions", and the load depends on
; control flow, we can only promote if the pointer is otherwise known to be
; dereferenceable
define i32 @test9() {
; CHECK-LABEL: @test9(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
; CHECK-NEXT: [[LOCAL_PROMOTED:%.*]] = load i32, i32* [[LOCAL]], align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[LOCAL_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[ELSE:%.*]] ]
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[ELSE]] ]
; CHECK-NEXT: [[J2:%.*]] = call i32 @opaque(i32 [[J]])
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[J2]], 0
; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[ELSE]]
; CHECK: if:
; CHECK-NEXT: br label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: [[X2]] = phi i32 [ 0, [[LOOP]] ], [ [[X21]], [[IF]] ]
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[ELSE]] ]
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* [[LOCAL]], align 4
; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[LOCAL]], align 4
; CHECK-NEXT: ret i32 [[RET]]
;
entry:
%local = alloca i32
call void @capture(i32* %local)
br label %loop
loop:
%j = phi i32 [ 0, %entry ], [ %next, %else ]
%j2 = call i32 @opaque(i32 %j)
%cmp = icmp eq i32 %j2, 0
br i1 %cmp, label %if, label %else
if:
%x = load i32, i32* %local
br label %else
else:
%x2 = phi i32 [ 0, %loop ], [ %x, %if]
store i32 %x2, i32* %local
%next = add i32 %j, 1
%cond = icmp eq i32 %next, 0
br i1 %cond, label %exit, label %loop
exit:
%ret = load i32, i32* %local
ret i32 %ret
}
define i32 @test9bad(i32 %i) {
; CHECK-LABEL: @test9bad(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[LOCAL:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @capture(i32* [[LOCAL]])
; CHECK-NEXT: [[NOTDEREF:%.*]] = getelementptr i32, i32* [[LOCAL]], i32 [[I:%.*]]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[NEXT:%.*]], [[ELSE:%.*]] ]
; CHECK-NEXT: [[J2:%.*]] = call i32 @opaque(i32 [[J]])
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[J2]], 0
; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[ELSE]]
; CHECK: if:
; CHECK-NEXT: [[X:%.*]] = load i32, i32* [[NOTDEREF]], align 4
; CHECK-NEXT: br label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: [[X2:%.*]] = phi i32 [ 0, [[LOOP]] ], [ [[X]], [[IF]] ]
; CHECK-NEXT: store i32 [[X2]], i32* [[NOTDEREF]], align 4
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: [[RET:%.*]] = load i32, i32* [[NOTDEREF]], align 4
; CHECK-NEXT: ret i32 [[RET]]
;
entry:
%local = alloca i32
call void @capture(i32* %local)
%notderef = getelementptr i32, i32* %local, i32 %i
br label %loop
loop:
%j = phi i32 [ 0, %entry ], [ %next, %else ]
%j2 = call i32 @opaque(i32 %j)
%cmp = icmp eq i32 %j2, 0
br i1 %cmp, label %if, label %else
if:
%x = load i32, i32* %notderef
br label %else
else:
%x2 = phi i32 [ 0, %loop ], [ %x, %if]
store i32 %x2, i32* %notderef
%next = add i32 %j, 1
%cond = icmp eq i32 %next, 0
br i1 %cond, label %exit, label %loop
exit:
%ret = load i32, i32* %notderef
ret i32 %ret
}
define void @test10(i32 %i) {
; CHECK-LABEL: @test10(
; CHECK-NEXT: Entry:
; CHECK-NEXT: [[X_PROMOTED:%.*]] = load atomic i32, i32* @X unordered, align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: Loop:
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[X_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[X2]] = add i32 [[X21]], 1
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[OUT:%.*]], label [[LOOP]]
; CHECK: Out:
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[LOOP]] ]
; CHECK-NEXT: store atomic i32 [[X2_LCSSA]], i32* @X unordered, align 4
; CHECK-NEXT: ret void
;
Entry:
br label %Loop
Loop: ; preds = %Loop, %0
%j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
%x = load atomic i32, i32* @X unordered, align 4
%x2 = add i32 %x, 1
store atomic i32 %x2, i32* @X unordered, align 4
%Next = add i32 %j, 1
%cond = icmp eq i32 %Next, 0
br i1 %cond, label %Out, label %Loop
Out:
ret void
}
; Early exit is known not to be taken on first iteration and thus doesn't
; effect whether load is known to execute.
define void @test11(i32 %i) {
; CHECK-LABEL: @test11(
; CHECK-NEXT: Entry:
; CHECK-NEXT: [[X_PROMOTED:%.*]] = load i32, i32* @X, align 4
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: Loop:
; CHECK-NEXT: [[X21:%.*]] = phi i32 [ [[X_PROMOTED]], [[ENTRY:%.*]] ], [ [[X2:%.*]], [[BODY:%.*]] ]
; CHECK-NEXT: [[J:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[NEXT:%.*]], [[BODY]] ]
; CHECK-NEXT: [[EARLY_TEST:%.*]] = icmp ult i32 [[J]], 32
; CHECK-NEXT: br i1 [[EARLY_TEST]], label [[BODY]], label [[EARLY:%.*]]
; CHECK: body:
; CHECK-NEXT: [[X2]] = add i32 [[X21]], 1
; CHECK-NEXT: [[NEXT]] = add i32 [[J]], 1
; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[NEXT]], 0
; CHECK-NEXT: br i1 [[COND]], label [[OUT:%.*]], label [[LOOP]]
; CHECK: Early:
; CHECK-NEXT: [[X21_LCSSA:%.*]] = phi i32 [ [[X21]], [[LOOP]] ]
; CHECK-NEXT: store i32 [[X21_LCSSA]], i32* @X, align 4
; CHECK-NEXT: ret void
; CHECK: Out:
; CHECK-NEXT: [[X2_LCSSA:%.*]] = phi i32 [ [[X2]], [[BODY]] ]
; CHECK-NEXT: store i32 [[X2_LCSSA]], i32* @X, align 4
; CHECK-NEXT: ret void
;
Entry:
br label %Loop
Loop: ; preds = %Loop, %0
%j = phi i32 [ 0, %Entry ], [ %Next, %body ] ; <i32> [#uses=1]
%early.test = icmp ult i32 %j, 32
br i1 %early.test, label %body, label %Early
body:
%x = load i32, i32* @X ; <i32> [#uses=1]
%x2 = add i32 %x, 1 ; <i32> [#uses=1]
store i32 %x2, i32* @X
%Next = add i32 %j, 1 ; <i32> [#uses=2]
%cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
br i1 %cond, label %Out, label %Loop
Early:
ret void
Out:
ret void
}
define i8 @test_hoistable_existing_load_sinkable_store_writeonly(i8* dereferenceable(8) %ptr, i8 %start) writeonly {
; CHECK: Function Attrs: writeonly
; CHECK-LABEL: @test_hoistable_existing_load_sinkable_store_writeonly(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[PTR_PROMOTED:%.*]] = load i8, i8* [[PTR:%.*]], align 1
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[INC1:%.*]] = phi i8 [ [[PTR_PROMOTED]], [[ENTRY:%.*]] ], [ [[INC1]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[I:%.*]] = phi i8 [ [[START:%.*]], [[ENTRY]] ], [ [[ADD:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[I]], 4
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_LATCH]], label [[EXIT:%.*]]
; CHECK: loop.latch:
; CHECK-NEXT: store i8 [[INC1]], i8* [[PTR]], align 1
; CHECK-NEXT: [[ADD]] = add i8 [[I]], [[INC1]]
; CHECK-NEXT: br label [[LOOP_HEADER]]
; CHECK: exit:
; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i8 [ [[I]], [[LOOP_HEADER]] ]
; CHECK-NEXT: ret i8 [[I_LCSSA]]
;
entry:
br label %loop.header
loop.header:
%i = phi i8 [ %start, %entry ], [ %add, %loop.latch ]
%cmp = icmp ult i8 %i, 4
br i1 %cmp, label %loop.latch, label %exit
loop.latch:
%div = sdiv i8 %i, 3
%inc = load i8, i8* %ptr
store i8 %inc, i8* %ptr
%add = add i8 %i, %inc
br label %loop.header
exit:
ret i8 %i
}
@glb = external global i8, align 1
; Test case for PR51248.
define void @test_sink_store_only() writeonly {
; CHECK: Function Attrs: writeonly
; CHECK-LABEL: @test_sink_store_only(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[DIV1:%.*]] = phi i8 [ poison, [[ENTRY:%.*]] ], [ [[DIV:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[I:%.*]] = phi i8 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[I]], 4
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_LATCH]], label [[EXIT:%.*]]
; CHECK: loop.latch:
; CHECK-NEXT: [[DIV]] = sdiv i8 [[I]], 3
; CHECK-NEXT: [[ADD]] = add i8 [[I]], 4
; CHECK-NEXT: br label [[LOOP_HEADER]]
; CHECK: exit:
; CHECK-NEXT: [[DIV1_LCSSA:%.*]] = phi i8 [ [[DIV1]], [[LOOP_HEADER]] ]
; CHECK-NEXT: store i8 [[DIV1_LCSSA]], i8* @glb, align 1
; CHECK-NEXT: ret void
;
entry:
br label %loop.header
loop.header:
%i = phi i8 [ 0, %entry ], [ %add, %loop.latch ]
%cmp = icmp ult i8 %i, 4
br i1 %cmp, label %loop.latch, label %exit
loop.latch:
%div = sdiv i8 %i, 3
store i8 %div, i8* @glb, align 1
%add = add i8 %i, 4
br label %loop.header
exit:
ret void
}
define void @test_sink_store_to_local_object_only_loop_must_execute() writeonly {
; CHECK: Function Attrs: writeonly
; CHECK-LABEL: @test_sink_store_to_local_object_only_loop_must_execute(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca i8, align 1
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[DIV1:%.*]] = phi i8 [ poison, [[ENTRY:%.*]] ], [ [[DIV:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[I:%.*]] = phi i8 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[I]], 4
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_LATCH]], label [[EXIT:%.*]]
; CHECK: loop.latch:
; CHECK-NEXT: [[DIV]] = sdiv i8 [[I]], 3
; CHECK-NEXT: [[ADD]] = add i8 [[I]], 4
; CHECK-NEXT: br label [[LOOP_HEADER]]
; CHECK: exit:
; CHECK-NEXT: [[DIV1_LCSSA:%.*]] = phi i8 [ [[DIV1]], [[LOOP_HEADER]] ]
; CHECK-NEXT: store i8 [[DIV1_LCSSA]], i8* [[A]], align 1
; CHECK-NEXT: ret void
;
entry:
%a = alloca i8
br label %loop.header
loop.header:
%i = phi i8 [ 0, %entry ], [ %add, %loop.latch ]
%cmp = icmp ult i8 %i, 4
br i1 %cmp, label %loop.latch, label %exit
loop.latch:
%div = sdiv i8 %i, 3
store i8 %div, i8* %a, align 1
%add = add i8 %i, 4
br label %loop.header
exit:
ret void
}
; The store in the loop may not execute, so we need to introduce a load in the
; pre-header. Make sure the writeonly attribute is dropped.
define void @test_sink_store_to_local_object_only_loop_may_not_execute(i8 %n) writeonly {
; CHECK: Function Attrs: writeonly
; CHECK-LABEL: @test_sink_store_to_local_object_only_loop_may_not_execute(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = alloca i8, align 1
; CHECK-NEXT: [[A_PROMOTED:%.*]] = load i8, i8* [[A]], align 1
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[DIV1:%.*]] = phi i8 [ [[A_PROMOTED]], [[ENTRY:%.*]] ], [ [[DIV:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[I:%.*]] = phi i8 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[I]], [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_LATCH]], label [[EXIT:%.*]]
; CHECK: loop.latch:
; CHECK-NEXT: [[DIV]] = sdiv i8 [[I]], 3
; CHECK-NEXT: [[ADD]] = add i8 [[I]], 4
; CHECK-NEXT: br label [[LOOP_HEADER]]
; CHECK: exit:
; CHECK-NEXT: [[DIV1_LCSSA:%.*]] = phi i8 [ [[DIV1]], [[LOOP_HEADER]] ]
; CHECK-NEXT: store i8 [[DIV1_LCSSA]], i8* [[A]], align 1
; CHECK-NEXT: ret void
;
entry:
%a = alloca i8
br label %loop.header
loop.header:
%i = phi i8 [ 0, %entry ], [ %add, %loop.latch ]
%cmp = icmp ult i8 %i, %n
br i1 %cmp, label %loop.latch, label %exit
loop.latch:
%div = sdiv i8 %i, 3
store i8 %div, i8* %a, align 1
%add = add i8 %i, 4
br label %loop.header
exit:
ret void
}
declare dereferenceable(8) noalias i8* @alloc_writeonly() writeonly
define void @test_sink_store_to_noalias_call_object_only_loop_may_not_execute1(i8 %n) writeonly {
; CHECK: Function Attrs: writeonly
; CHECK-LABEL: @test_sink_store_to_noalias_call_object_only_loop_may_not_execute1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[A:%.*]] = call noalias dereferenceable(8) i8* @alloc_writeonly()
; CHECK-NEXT: [[A_PROMOTED:%.*]] = load i8, i8* [[A]], align 1
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[DIV1:%.*]] = phi i8 [ [[A_PROMOTED]], [[ENTRY:%.*]] ], [ [[DIV:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[I:%.*]] = phi i8 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[I]], [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_LATCH]], label [[EXIT:%.*]]
; CHECK: loop.latch:
; CHECK-NEXT: [[DIV]] = sdiv i8 [[I]], 3
; CHECK-NEXT: [[ADD]] = add i8 [[I]], 4
; CHECK-NEXT: br label [[LOOP_HEADER]]
; CHECK: exit:
; CHECK-NEXT: [[DIV1_LCSSA:%.*]] = phi i8 [ [[DIV1]], [[LOOP_HEADER]] ]
; CHECK-NEXT: store i8 [[DIV1_LCSSA]], i8* [[A]], align 1
; CHECK-NEXT: ret void
;
entry:
%a = call dereferenceable(8) noalias i8* @alloc_writeonly()
br label %loop.header
loop.header:
%i = phi i8 [ 0, %entry ], [ %add, %loop.latch ]
%cmp = icmp ult i8 %i, %n
br i1 %cmp, label %loop.latch, label %exit
loop.latch:
%div = sdiv i8 %i, 3
store i8 %div, i8* %a, align 1
%add = add i8 %i, 4
br label %loop.header
exit:
ret void
}
define void @test_sink_store_only_no_phi_needed() writeonly {
; CHECK: Function Attrs: writeonly
; CHECK-LABEL: @test_sink_store_only_no_phi_needed(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[I:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[ADD:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i8 [[I]], 4
; CHECK-NEXT: [[DIV:%.*]] = sdiv i8 [[I]], 3
; CHECK-NEXT: [[ADD]] = add i8 [[I]], 4
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: [[DIV_LCSSA:%.*]] = phi i8 [ [[DIV]], [[LOOP]] ]
; CHECK-NEXT: store i8 [[DIV_LCSSA]], i8* @glb, align 1
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%i = phi i8 [ 0, %entry ], [ %add, %loop ]
%cmp = icmp ult i8 %i, 4
%div = sdiv i8 %i, 3
store i8 %div, i8* @glb, align 1
%add = add i8 %i, 4
br i1 %cmp, label %loop, label %exit
exit:
ret void
}
define void @sink_store_lcssa_phis(i32* %ptr, i1 %c) {
; CHECK-LABEL: @sink_store_lcssa_phis(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_1_HEADER:%.*]]
; CHECK: loop.1.header:
; CHECK-NEXT: br label [[LOOP_2_HEADER:%.*]]
; CHECK: loop.2.header:
; CHECK-NEXT: br i1 false, label [[LOOP_3_HEADER_PREHEADER:%.*]], label [[LOOP_1_LATCH:%.*]]
; CHECK: loop.3.header.preheader:
; CHECK-NEXT: br label [[LOOP_3_HEADER:%.*]]
; CHECK: loop.3.header:
; CHECK-NEXT: [[I_11:%.*]] = phi i32 [ [[I_1:%.*]], [[LOOP_3_LATCH:%.*]] ], [ poison, [[LOOP_3_HEADER_PREHEADER]] ]
; CHECK-NEXT: [[I_1]] = phi i32 [ 1, [[LOOP_3_LATCH]] ], [ 0, [[LOOP_3_HEADER_PREHEADER]] ]
; CHECK-NEXT: br i1 true, label [[LOOP_3_LATCH]], label [[LOOP_2_LATCH:%.*]]
; CHECK: loop.3.latch:
; CHECK-NEXT: br label [[LOOP_3_HEADER]]
; CHECK: loop.2.latch:
; CHECK-NEXT: [[I_11_LCSSA:%.*]] = phi i32 [ [[I_11]], [[LOOP_3_HEADER]] ]
; CHECK-NEXT: store i32 [[I_11_LCSSA]], i32* [[PTR:%.*]], align 4
; CHECK-NEXT: br label [[LOOP_2_HEADER]]
; CHECK: loop.1.latch:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LOOP_1_HEADER]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop.1.header
loop.1.header:
br label %loop.2.header
loop.2.header:
br i1 false, label %loop.3.header, label %loop.1.latch
loop.3.header:
%i.1 = phi i32 [ 1, %loop.3.latch ], [ 0, %loop.2.header ]
br i1 true, label %loop.3.latch, label %loop.2.latch
loop.3.latch:
store i32 %i.1, i32* %ptr, align 4
br label %loop.3.header
loop.2.latch:
br label %loop.2.header
loop.1.latch:
br i1 %c, label %loop.1.header, label %exit
exit:
ret void
}
!0 = !{!4, !4, i64 0}
!1 = !{!"omnipotent char", !2}
!2 = !{!"Simple C/C++ TBAA"}
!3 = !{!5, !5, i64 0}
!4 = !{!"int", !1}
!5 = !{!"float", !1}