forked from OSchip/llvm-project
39 lines
848 B
LLVM
39 lines
848 B
LLVM
; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
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; Check that we convert
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; zext((a * b)<nuw>)
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; to
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; (zext(a) * zext(b))<nuw>
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declare i32 @get_int();
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; Transform doesn't apply here, because %a lacks range metadata.
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; CHECK-LABEL: @no_range
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define void @no_range() {
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%a = call i32 @get_int()
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%b = mul i32 %a, 4
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%c = zext i32 %b to i64
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; CHECK: %c
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; CHECK-NEXT: --> (zext i32 (4 * %a) to i64)
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ret void
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}
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; CHECK-LABEL: @range
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define void @range() {
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%a = call i32 @get_int(), !range !{i32 0, i32 100}
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%b = mul i32 %a, 4
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%c = zext i32 %b to i64
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; CHECK: %c
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; CHECK-NEXT: --> (4 * (zext i32 %a to i64))<nuw><nsw>
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ret void
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}
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; CHECK-LABEL: @no_nuw
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define void @no_nuw() {
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%a = call i32 @get_int(), !range !{i32 0, i32 3}
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%b = mul i32 %a, -100
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; CHECK: %b
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; CHECK-NEXT: --> (-100 * %a)<nsw>
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ret void
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}
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