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comparison test/CodeGen/X86/stack-folding-x86_64.ll @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
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children 7d135dc70f03
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84:f3e34b893a5f 95:afa8332a0e37
1 ; RUN: llc -O3 -disable-peephole -mtriple=x86_64-unknown-unknown -mcpu=x86-64 < %s | FileCheck %s
2
3 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4 target triple = "x86_64-unknown-unknown"
5
6 ; Stack reload folding tests.
7 ;
8 ; By including a nop call with sideeffects we can force a partial register spill of the
9 ; relevant registers and check that the reload is correctly folded into the instruction.
10
11 ;TODO stack_fold_bsf_i16
12 declare i16 @llvm.cttz.i16(i16, i1)
13
14 define i32 @stack_fold_bsf_i32(i32 %a0) {
15 ;CHECK-LABEL: stack_fold_bsf_i32
16 ;CHECK: bsfl {{-?[0-9]*}}(%rsp), %eax {{.*#+}} 4-byte Folded Reload
17 %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
18 %2 = call i32 @llvm.cttz.i32(i32 %a0, i1 -1)
19 ret i32 %2
20 }
21 declare i32 @llvm.cttz.i32(i32, i1)
22
23 define i64 @stack_fold_bsf_i64(i64 %a0) {
24 ;CHECK-LABEL: stack_fold_bsf_i64
25 ;CHECK: bsfq {{-?[0-9]*}}(%rsp), %rax {{.*#+}} 8-byte Folded Reload
26 %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
27 %2 = call i64 @llvm.cttz.i64(i64 %a0, i1 -1)
28 ret i64 %2
29 }
30 declare i64 @llvm.cttz.i64(i64, i1)
31
32 ;TODO stack_fold_bsr_i16
33 declare i16 @llvm.ctlz.i16(i16, i1)
34
35 define i32 @stack_fold_bsr_i32(i32 %a0) {
36 ;CHECK-LABEL: stack_fold_bsr_i32
37 ;CHECK: bsrl {{-?[0-9]*}}(%rsp), %eax {{.*#+}} 4-byte Folded Reload
38 %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
39 %2 = call i32 @llvm.ctlz.i32(i32 %a0, i1 -1)
40 ret i32 %2
41 }
42 declare i32 @llvm.ctlz.i32(i32, i1)
43
44 define i64 @stack_fold_bsr_i64(i64 %a0) {
45 ;CHECK-LABEL: stack_fold_bsr_i64
46 ;CHECK: bsrq {{-?[0-9]*}}(%rsp), %rax {{.*#+}} 8-byte Folded Reload
47 %1 = tail call i64 asm sideeffect "nop", "=x,~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
48 %2 = call i64 @llvm.ctlz.i64(i64 %a0, i1 -1)
49 ret i64 %2
50 }
51 declare i64 @llvm.ctlz.i64(i64, i1)