43 lines
1.1 KiB
LLVM
43 lines
1.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -passes=sccp -S | FileCheck %s
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; Test that SCCP has basic knowledge of when div can nuke overdefined values.
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; 0 / X = 0 even if X is overdefined.
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define i32 @test1(i32 %foo) {
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; CHECK-LABEL: define i32 @test1
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; CHECK-SAME: (i32 [[FOO:%.*]]) {
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; CHECK-NEXT: ret i32 0
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;
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%tinkywinky = udiv i32 0, %foo
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ret i32 %tinkywinky
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}
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define i32 @test2(i32 %foo) {
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; CHECK-LABEL: define i32 @test2
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; CHECK-SAME: (i32 [[FOO:%.*]]) {
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; CHECK-NEXT: ret i32 0
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;
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%tinkywinky = sdiv i32 0, %foo
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ret i32 %tinkywinky
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}
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define i32 @test3(i32 %foo) {
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; CHECK-LABEL: define i32 @test3
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; CHECK-SAME: (i32 [[FOO:%.*]]) {
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; CHECK-NEXT: [[TINKYWINKY:%.*]] = udiv i32 [[FOO]], 0
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; CHECK-NEXT: ret i32 [[TINKYWINKY]]
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;
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%tinkywinky = udiv i32 %foo, 0
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ret i32 %tinkywinky
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}
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define i32 @test4(i32 %foo) {
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; CHECK-LABEL: define i32 @test4
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; CHECK-SAME: (i32 [[FOO:%.*]]) {
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; CHECK-NEXT: [[TINKYWINKY:%.*]] = sdiv i32 [[FOO]], 0
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; CHECK-NEXT: ret i32 [[TINKYWINKY]]
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;
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%tinkywinky = sdiv i32 %foo, 0
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ret i32 %tinkywinky
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}
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