| ; 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 |
| |
