derek.holloway
7502bf64a4
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96 lines
2.8 KiB
LLVM
96 lines
2.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-linux | FileCheck %s
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@ok = internal constant [4 x i8] c"%d\0A\00"
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@no = internal constant [4 x i8] c"no\0A\00"
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define i1 @func1(i32 %v1, i32 %v2) nounwind {
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; CHECK-LABEL: func1:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: subl $12, %esp
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: subl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: jno .LBB0_1
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; CHECK-NEXT: # %bb.2: # %overflow
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; CHECK-NEXT: movl $no, (%esp)
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; CHECK-NEXT: calll printf@PLT
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: addl $12, %esp
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; CHECK-NEXT: retl
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; CHECK-NEXT: .LBB0_1: # %normal
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; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp)
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; CHECK-NEXT: movl $ok, (%esp)
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; CHECK-NEXT: calll printf@PLT
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; CHECK-NEXT: movb $1, %al
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; CHECK-NEXT: addl $12, %esp
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; CHECK-NEXT: retl
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entry:
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%t = call {i32, i1} @llvm.ssub.with.overflow.i32(i32 %v1, i32 %v2)
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%sum = extractvalue {i32, i1} %t, 0
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%obit = extractvalue {i32, i1} %t, 1
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br i1 %obit, label %overflow, label %normal
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normal:
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%t1 = tail call i32 (ptr, ...) @printf( ptr @ok, i32 %sum ) nounwind
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ret i1 true
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overflow:
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%t2 = tail call i32 (ptr, ...) @printf( ptr @no ) nounwind
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ret i1 false
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}
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define i1 @func2(i32 %v1, i32 %v2) nounwind {
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; CHECK-LABEL: func2:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: subl $12, %esp
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: subl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: jae .LBB1_1
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; CHECK-NEXT: # %bb.2: # %carry
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; CHECK-NEXT: movl $no, (%esp)
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; CHECK-NEXT: calll printf@PLT
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: addl $12, %esp
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; CHECK-NEXT: retl
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; CHECK-NEXT: .LBB1_1: # %normal
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; CHECK-NEXT: movl %eax, {{[0-9]+}}(%esp)
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; CHECK-NEXT: movl $ok, (%esp)
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; CHECK-NEXT: calll printf@PLT
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; CHECK-NEXT: movb $1, %al
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; CHECK-NEXT: addl $12, %esp
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; CHECK-NEXT: retl
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entry:
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%t = call {i32, i1} @llvm.usub.with.overflow.i32(i32 %v1, i32 %v2)
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%sum = extractvalue {i32, i1} %t, 0
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%obit = extractvalue {i32, i1} %t, 1
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br i1 %obit, label %carry, label %normal
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normal:
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%t1 = tail call i32 (ptr, ...) @printf( ptr @ok, i32 %sum ) nounwind
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ret i1 true
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carry:
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%t2 = tail call i32 (ptr, ...) @printf( ptr @no ) nounwind
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ret i1 false
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}
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declare i32 @printf(ptr, ...) nounwind
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declare {i32, i1} @llvm.ssub.with.overflow.i32(i32, i32)
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declare {i32, i1} @llvm.usub.with.overflow.i32(i32, i32)
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define i1 @func3(i32 %x) nounwind {
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; CHECK-LABEL: func3:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movl {{[0-9]+}}(%esp), %eax
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; CHECK-NEXT: decl %eax
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; CHECK-NEXT: seto %al
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; CHECK-NEXT: retl
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entry:
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%t = call {i32, i1} @llvm.ssub.with.overflow.i32(i32 %x, i32 1)
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%obit = extractvalue {i32, i1} %t, 1
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ret i1 %obit
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}
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