[llvm-branch-commits] [llvm] 77ce35a - [test][DAGCombine] Add tests for combining carry diamond. NFC

[Paweł Bylica via llvm-branch-commits]

Author: Paweł Bylica
Date: 2022-08-16T10:03:45+02:00
New Revision: 77ce35a1d7e040d752fe89c1c8a20710354e235f

URL: https://github.com/llvm/llvm-project/commit/77ce35a1d7e040d752fe89c1c8a20710354e235f
DIFF: https://github.com/llvm/llvm-project/commit/77ce35a1d7e040d752fe89c1c8a20710354e235f.diff

LOG: [test][DAGCombine] Add tests for combining carry diamond. NFC

Added: 
    

Modified: 
    llvm/test/CodeGen/X86/subcarry.ll

Removed: 
    


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diff  --git a/llvm/test/CodeGen/X86/subcarry.ll b/llvm/test/CodeGen/X86/subcarry.ll
index 1ee37297dfee..50186308e39b 100644
--- a/llvm/test/CodeGen/X86/subcarry.ll
+++ b/llvm/test/CodeGen/X86/subcarry.ll
@@ -310,15 +310,16 @@ define { i64, i64, i1 } @subcarry_2x64_add_reversed(i64 %x0, i64 %x1, i64 %y0, i
 ; CHECK-LABEL: subcarry_2x64_add_reversed:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    movq %rdi, %rax
-; CHECK-NEXT:    movq %rsi, %rdi
-; CHECK-NEXT:    subq %rcx, %rdi
+; CHECK-NEXT:    xorl %edi, %edi
 ; CHECK-NEXT:    subq %rdx, %rax
-; CHECK-NEXT:    sbbq $0, %rdi
-; CHECK-NEXT:    setb %r8b
+; CHECK-NEXT:    setb %dil
+; CHECK-NEXT:    movq %rsi, %rdx
+; CHECK-NEXT:    subq %rcx, %rdx
+; CHECK-NEXT:    subq %rdi, %rdx
+; CHECK-NEXT:    setb %dil
 ; CHECK-NEXT:    cmpq %rcx, %rsi
-; CHECK-NEXT:    adcb $0, %r8b
-; CHECK-NEXT:    movq %rdi, %rdx
-; CHECK-NEXT:    movl %r8d, %ecx
+; CHECK-NEXT:    adcb $0, %dil
+; CHECK-NEXT:    movl %edi, %ecx
 ; CHECK-NEXT:    retq
   %t0 = call { i64, i1 } @llvm.usub.with.overflow.i64(i64 %x0, i64 %y0)
   %s0 = extractvalue { i64, i1 } %t0, 0
@@ -346,7 +347,8 @@ define { i64, i1 } @subcarry_fake_carry(i64 %a, i64 %b, i1 %carryin) {
 ; CHECK-LABEL: subcarry_fake_carry:
 ; CHECK:       # %bb.0:
 ; CHECK-NEXT:    movq %rdi, %rax
-; CHECK-NEXT:    btl $0, %edx
+; CHECK-NEXT:    andb $1, %dl
+; CHECK-NEXT:    addb $-1, %dl
 ; CHECK-NEXT:    sbbq %rsi, %rax
 ; CHECK-NEXT:    setb %dl
 ; CHECK-NEXT:    retq