| blob | 15c9d194be41a602570c35d6c0dc2d15ed10fda6 |
1 ; RUN: llc -mtriple=x86_64-unknown-linux-gnu -enable-misched=false < %s | FileCheck %s
3 define i32 @fold64to32(i64 %add, i32 %spill) {
4 ; CHECK-LABEL: fold64to32:
5 ; CHECK: movq %rdi, -{{[0-9]+}}(%rsp) # 8-byte Spill
6 ; CHECK: subl -{{[0-9]+}}(%rsp), %esi # 4-byte Folded Reload
7 entry:
8 tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
9 %trunc = trunc i64 %add to i32
10 %sub = sub i32 %spill, %trunc
11 ret i32 %sub
12 }
14 define i8 @fold64to8(i64 %add, i8 %spill) {
15 ; CHECK-LABEL: fold64to8:
16 ; CHECK: movq %rdi, -{{[0-9]+}}(%rsp) # 8-byte Spill
17 ; CHECK: subb -{{[0-9]+}}(%rsp), %sil # 1-byte Folded Reload
18 entry:
19 tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
20 %trunc = trunc i64 %add to i8
21 %sub = sub i8 %spill, %trunc
22 ret i8 %sub
23 }
25 ; Do not fold a 4-byte store into a 8-byte spill slot
26 ; CHECK-LABEL: nofold
27 ; CHECK: movq %rsi, -{{[0-9]+}}(%rsp) # 8-byte Spill
28 ; CHECK: movq -{{[0-9]+}}(%rsp), %rax # 8-byte Reload
29 ; CHECK: subl %edi, %eax
30 ; CHECK: movq %rax, -{{[0-9]+}}(%rsp) # 8-byte Spill
31 ; CHECK: movq -{{[0-9]+}}(%rsp), %rax # 8-byte Reload
32 define i32 @nofold(i64 %add, i64 %spill) {
33 entry:
34 tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
35 %trunc = trunc i64 %add to i32
36 %truncspill = trunc i64 %spill to i32
37 %sub = sub i32 %truncspill, %trunc
38 tail call void asm sideeffect "", "~{rax},~{rbx},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
39 ret i32 %sub
40 }