; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s -check-prefix=X64
; RUN: llc < %s -mtriple=i686-unknown-linux-gnu | FileCheck %s -check-prefix=X32
; CHECK-LABEL: foo
; Check the functionality of the local stack symbol table ordering
; heuristics.
; The test has a bunch of locals of various sizes that are referenced a
; different number of times.
;
; a : 120B, 9 uses, density = 0.075
; aa : 4000B, 1 use, density = 0.00025
; b : 4B, 1 use, density = 0.25
; cc : 4000B, 2 uses density = 0.0005
; d : 4B, 2 uses density = 0.5
; e : 4B, 3 uses density = 0.75
; f : 4B, 4 uses density = 1
;
; Given the size, number of uses and calculated density (uses / size), we're
; going to hope that f gets allocated closest to the stack pointer,
; followed by e, d, b, then a (to check for just a few).
; We use gnu-inline asm between calls to prevent registerization of addresses
; so that we get exact counts.
;
; The test is taken from something like this:
; void foo()
; {
; int f; // 4 uses. 4 / 4 = 1
; int a[30]; // 9 uses. 8 / 120 = 0.06
; int aa[1000]; // 1 use. 1 / 4000 =
; int e; // 3 uses. 3 / 4 = 0.75
; int cc[1000]; // 2 uses. 2 / 4000 =
; int b; // 1 use. 1 / 4 = 0.25
; int d; // 2 uses. 2 / 4 = 0.5
; int aaa[1000]; // 2 uses. 2 / 4000
;
;
; check_a(&a);
; bar1(&aaa);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar1(&a);
; check_f(&f);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar1(&a);
; bar3(&aa, &aaa, &cc);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar2(&a,&cc);
; check_b(&b);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar1(&a);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar2(&a, &f);
; check_e(&e);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar1(&a);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar2(&e, &f);
; check_d(&d);
; bar1(&a);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar3(&d, &e, &f);
; asm ("":::"esi","edi","ebp","ebx","rbx","r12","r13","r14","r15","rbp");
; bar1(&a);
; }
;
; X64: leaq 16(%rsp), %rdi
; X64: callq check_a
; X64: callq bar1
; X64: callq bar1
; X64: movq %rsp, %rdi
; X64: callq check_f
; X64: callq bar1
; X64: callq bar3
; X64: callq bar2
; X64: leaq 12(%rsp), %rdi
; X64: callq check_b
; X64: callq bar1
; X64: callq bar2
; X64: leaq 4(%rsp), %rdi
; X64: callq check_e
; X64: callq bar1
; X64: callq bar2
; X64: leaq 8(%rsp), %rdi
; X64: callq check_d
; X32: leal 32(%esp)
; X32: calll check_a
; X32: calll bar1
; X32: calll bar1
; X32: leal 16(%esp)
; X32: calll check_f
; X32: calll bar1
; X32: calll bar3
; X32: calll bar2
; X32: leal 28(%esp)
; X32: calll check_b
; X32: calll bar1
; X32: calll bar2
; X32: leal 20(%esp)
; X32: calll check_e
; X32: calll bar1
; X32: calll bar2
; X32: leal 24(%esp)
; X32: calll check_d
define void @foo() nounwind uwtable {
entry:
%f = alloca i32, align 4
%a = alloca [30 x i32], align 16
%aa = alloca [1000 x i32], align 16
%e = alloca i32, align 4
%cc = alloca [1000 x i32], align 16
%b = alloca i32, align 4
%d = alloca i32, align 4
%aaa = alloca [1000 x i32], align 16
call void @llvm.lifetime.start.p0(i64 4, ptr %f) #1
call void @llvm.lifetime.start.p0(i64 120, ptr %a) #1
call void @llvm.lifetime.start.p0(i64 4000, ptr %aa) #1
call void @llvm.lifetime.start.p0(i64 4, ptr %e) #1
call void @llvm.lifetime.start.p0(i64 4000, ptr %cc) #1
call void @llvm.lifetime.start.p0(i64 4, ptr %b) #1
call void @llvm.lifetime.start.p0(i64 4, ptr %d) #1
call void @llvm.lifetime.start.p0(i64 4000, ptr %aaa) #1
%call = call i32 (ptr, ...) @check_a(ptr %a)
%call1 = call i32 (ptr, ...) @bar1(ptr %aaa)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call2 = call i32 (ptr, ...) @bar1(ptr %a)
%call3 = call i32 (ptr, ...) @check_f(ptr %f)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call4 = call i32 (ptr, ...) @bar1(ptr %a)
%call5 = call i32 (ptr, ptr, ptr, ...) @bar3(ptr %aa, ptr %aaa, ptr %cc)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call6 = call i32 (ptr, ptr, ...) @bar2(ptr %a, ptr %cc)
%call7 = call i32 (ptr, ...) @check_b(ptr %b)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call8 = call i32 (ptr, ...) @bar1(ptr %a)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call9 = call i32 (ptr, ptr, ...) @bar2(ptr %a, ptr %f)
%call10 = call i32 (ptr, ...) @check_e(ptr %e)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call11 = call i32 (ptr, ...) @bar1(ptr %a)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call12 = call i32 (ptr, ptr, ...) @bar2(ptr %e, ptr %f)
%call13 = call i32 (ptr, ...) @check_d(ptr %d)
%call14 = call i32 (ptr, ...) @bar1(ptr %a)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call15 = call i32 (ptr, ptr, ptr, ...) @bar3(ptr %d, ptr %e, ptr %f)
call void asm sideeffect "", "~{esi},~{edi},~{ebp},~{ebx},~{rbx},~{r12},~{r13},~{r14},~{r15},~{rbp},~{dirflag},~{fpsr},~{flags}"() #1
%call16 = call i32 (ptr, ...) @bar1(ptr %a)
call void @llvm.lifetime.end.p0(i64 4000, ptr %aaa) #1
call void @llvm.lifetime.end.p0(i64 4, ptr %d) #1
call void @llvm.lifetime.end.p0(i64 4, ptr %b) #1
call void @llvm.lifetime.end.p0(i64 4000, ptr %cc) #1
call void @llvm.lifetime.end.p0(i64 4, ptr %e) #1
call void @llvm.lifetime.end.p0(i64 4000, ptr %aa) #1
call void @llvm.lifetime.end.p0(i64 120, ptr %a) #1
call void @llvm.lifetime.end.p0(i64 4, ptr %f) #1
ret void
}
; Function Attrs: nounwind
declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
declare i32 @check_a(...) #2
declare i32 @bar1(...) #2
declare i32 @check_f(...) #2
declare i32 @bar3(...) #2
declare i32 @bar2(...) #2
declare i32 @check_b(...) #2
declare i32 @check_e(...) #2
declare i32 @check_d(...) #2
; Function Attrs: nounwind
declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1