| ; RUN: llc -O3 -disable-peephole -mtriple=x86_64-unknown-unknown < %s | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-unknown" |
| |
| ; Stack reload folding tests. |
| ; |
| ; By including a nop call with sideeffects we can force a partial register spill of the |
| ; relevant registers and check that the reload is correctly folded into the instruction. |
| |
| ;TODO stack_fold_bsf_i16 |
| declare i16 @llvm.cttz.i16(i16, i1) |
| |
| define i32 @stack_fold_bsf_i32(i32 %a0) { |
| ;CHECK-LABEL: stack_fold_bsf_i32 |
| ;CHECK: bsfl {{-?[0-9]*}}(%rsp), %eax {{.*#+}} 4-byte Folded Reload |
| %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() |
| %2 = call i32 @llvm.cttz.i32(i32 %a0, i1 -1) |
| ret i32 %2 |
| } |
| declare i32 @llvm.cttz.i32(i32, i1) |
| |
| define i64 @stack_fold_bsf_i64(i64 %a0) { |
| ;CHECK-LABEL: stack_fold_bsf_i64 |
| ;CHECK: bsfq {{-?[0-9]*}}(%rsp), %rax {{.*#+}} 8-byte Folded Reload |
| %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() |
| %2 = call i64 @llvm.cttz.i64(i64 %a0, i1 -1) |
| ret i64 %2 |
| } |
| declare i64 @llvm.cttz.i64(i64, i1) |
| |
| ;TODO stack_fold_bsr_i16 |
| declare i16 @llvm.ctlz.i16(i16, i1) |
| |
| define i32 @stack_fold_bsr_i32(i32 %a0) { |
| ;CHECK-LABEL: stack_fold_bsr_i32 |
| ;CHECK: bsrl {{-?[0-9]*}}(%rsp), %eax {{.*#+}} 4-byte Folded Reload |
| %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() |
| %2 = call i32 @llvm.ctlz.i32(i32 %a0, i1 -1) |
| ret i32 %2 |
| } |
| declare i32 @llvm.ctlz.i32(i32, i1) |
| |
| define i64 @stack_fold_bsr_i64(i64 %a0) { |
| ;CHECK-LABEL: stack_fold_bsr_i64 |
| ;CHECK: bsrq {{-?[0-9]*}}(%rsp), %rax {{.*#+}} 8-byte Folded Reload |
| %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"() |
| %2 = call i64 @llvm.ctlz.i64(i64 %a0, i1 -1) |
| ret i64 %2 |
| } |
| declare i64 @llvm.ctlz.i64(i64, i1) |