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[X86] Add subborrow stack folding tests 

llvm-svn: 295496
This commit is contained in:
Simon Pilgrim 2017-02-17 21:16:24 +00:00
parent 00872c3dfe
commit 996f9b4cad
1 changed files with 18 additions and 0 deletions
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18
llvm/test/CodeGen/X86/stack-folding-adx-x86_64.ll
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@ -43,3 +43,21 @@ define i8 @stack_fold_addcarryx_u64(i8 %a0, i64 %a1, i64 %a2, i8* %a3) {
ret i8 %2;
}
declare i8 @llvm.x86.addcarryx.u64(i8, i64, i64, i8*)
define i8 @stack_fold_subborrow_u32(i8 %a0, i32 %a1, i32 %a2, i8* %a3) {
;CHECK-LABEL: stack_fold_subborrow_u32
;CHECK: sbbl {{-?[0-9]*}}(%rsp), %ecx {{.*#+}} 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 = tail call i8 @llvm.x86.subborrow.u32(i8 %a0, i32 %a1, i32 %a2, i8* %a3)
ret i8 %2;
}
declare i8 @llvm.x86.subborrow.u32(i8, i32, i32, i8*)
define i8 @stack_fold_subborrow_u64(i8 %a0, i64 %a1, i64 %a2, i8* %a3) {
;CHECK-LABEL: stack_fold_subborrow_u64
;CHECK: sbbq {{-?[0-9]*}}(%rsp), %rcx {{.*#+}} 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 = tail call i8 @llvm.x86.subborrow.u64(i8 %a0, i64 %a1, i64 %a2, i8* %a3)
ret i8 %2;
}
declare i8 @llvm.x86.subborrow.u64(i8, i64, i64, i8*)