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[X86] addcarry.ll - add test coverage for #169691 #169716

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Merged
RKSimon merged 1 commit into from
Nov 26, 2025
Merged

[X86] addcarry.ll - add test coverage for #169691 #169716

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38 changes: 38 additions & 0 deletions llvm/test/CodeGen/X86/addcarry.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -1513,3 +1513,41 @@ define i1 @pr84831(i64 %arg) {
%trunc = trunc i63 %or to i1
ret i1 %trunc
}

define void @pr169691(ptr %p0, i64 %implicit, i1 zeroext %carry) {
; CHECK-LABEL: pr169691:
; CHECK: # %bb.0:
; CHECK-NEXT: movq (%rdi), %rax
; CHECK-NEXT: addq %rsi, %rax
; CHECK-NEXT: setb %cl
; CHECK-NEXT: movl %edx, %edx
; CHECK-NEXT: addq %rax, %rdx
; CHECK-NEXT: setb %al
; CHECK-NEXT: orb %cl, %al
; CHECK-NEXT: movq %rdx, (%rdi)
; CHECK-NEXT: addq 8(%rdi), %rsi
; CHECK-NEXT: movzbl %al, %eax
; CHECK-NEXT: addq %rsi, %rax
; CHECK-NEXT: movq %rax, 8(%rdi)
; CHECK-NEXT: retq
%a0 = load i64, ptr %p0, align 8
%uaddo0 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %a0, i64 %implicit)
%uaddo0.1 = extractvalue { i64, i1 } %uaddo0, 1
%uaddo0.0 = extractvalue { i64, i1 } %uaddo0, 0
%zextc = zext i1 %carry to i64
%uaddo0b = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %uaddo0.0, i64 %zextc)
%uaddo0b.1 = extractvalue { i64, i1 } %uaddo0b, 1
%uaddo0b.0 = extractvalue { i64, i1 } %uaddo0b, 0
%carry0 = or i1 %uaddo0.1, %uaddo0b.1
store i64 %uaddo0b.0, ptr %p0, align 8

%p1 = getelementptr inbounds nuw i8, ptr %p0, i64 8
%a1 = load i64, ptr %p1, align 8
%uaddo1 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %a1, i64 %implicit)
%uaddo1.0 = extractvalue { i64, i1 } %uaddo1, 0
%zext0 = zext i1 %carry0 to i64
%uaddo1b = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %uaddo1.0, i64 %zext0)
%uaddo1b.0 = extractvalue { i64, i1 } %uaddo1b, 0
store i64 %uaddo1b.0, ptr %p1, align 8
ret void
}
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