diff options
Diffstat (limited to 'test/Transforms/SCCP/overdefined-div.ll')
| -rw-r--r-- | test/Transforms/SCCP/overdefined-div.ll | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test/Transforms/SCCP/overdefined-div.ll b/test/Transforms/SCCP/overdefined-div.ll new file mode 100644 index 0000000000000..f0b16155c1787 --- /dev/null +++ b/test/Transforms/SCCP/overdefined-div.ll @@ -0,0 +1,32 @@ +; RUN: opt < %s -sccp -S | FileCheck %s + +; Test that SCCP has basic knowledge of when div can nuke overdefined values. + +; 0 / X = 0 even if X is overdefined. +; CHECK-LABEL: test1 +; CHECK-NEXT: ret i32 0 +define i32 @test1(i32 %foo) { + %tinkywinky = udiv i32 0, %foo + ret i32 %tinkywinky +} + +; CHECK-LABEL: test2 +; CHECK-NEXT: ret i32 0 +define i32 @test2(i32 %foo) { + %tinkywinky = sdiv i32 0, %foo + ret i32 %tinkywinky +} + +; CHECK-LABEL: test3 +; CHECK: ret i32 %tinkywinky +define i32 @test3(i32 %foo) { + %tinkywinky = udiv i32 %foo, 0 + ret i32 %tinkywinky +} + +; CHECK-LABEL: test4 +; CHECK: ret i32 %tinkywinky +define i32 @test4(i32 %foo) { + %tinkywinky = sdiv i32 %foo, 0 + ret i32 %tinkywinky +} |