34 lines
929 B
LLVM
34 lines
929 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @assume_add(i32 %a, i32 %b) {
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; CHECK-LABEL: @assume_add(
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; CHECK-NEXT: [[T1:%.*]] = add i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[LAST_TWO_DIGITS:%.*]] = and i32 [[T1]], 3
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; CHECK-NEXT: [[T2:%.*]] = icmp eq i32 [[LAST_TWO_DIGITS]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[T2]])
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; CHECK-NEXT: [[T3:%.*]] = or i32 [[T1]], 3
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; CHECK-NEXT: ret i32 [[T3]]
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;
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%t1 = add i32 %a, %b
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%last_two_digits = and i32 %t1, 3
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%t2 = icmp eq i32 %last_two_digits, 0
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call void @llvm.assume(i1 %t2)
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%t3 = add i32 %t1, 3
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ret i32 %t3
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}
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define void @assume_not() {
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; CHECK-LABEL: @assume_not(
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entry-block:
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%0 = call i1 @get_val()
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; CHECK: call void @llvm.assume
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%1 = xor i1 %0, true
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call void @llvm.assume(i1 %1)
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ret void
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}
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declare i1 @get_val()
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declare void @llvm.assume(i1)
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