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Diffstat (limited to 'test/Transforms/InstCombine/cast-set.ll')
-rw-r--r-- | test/Transforms/InstCombine/cast-set.ll | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/cast-set.ll b/test/Transforms/InstCombine/cast-set.ll new file mode 100644 index 000000000000..091f148a2483 --- /dev/null +++ b/test/Transforms/InstCombine/cast-set.ll @@ -0,0 +1,51 @@ +; This tests for various complex cast elimination cases instcombine should +; handle. + +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | notcast + +define i1 @test1(i32 %X) { + %A = bitcast i32 %X to i32 ; <i32> [#uses=1] + ; Convert to setne int %X, 12 + %c = icmp ne i32 %A, 12 ; <i1> [#uses=1] + ret i1 %c +} + +define i1 @test2(i32 %X, i32 %Y) { + %A = bitcast i32 %X to i32 ; <i32> [#uses=1] + %B = bitcast i32 %Y to i32 ; <i32> [#uses=1] + ; Convert to setne int %X, %Y + %c = icmp ne i32 %A, %B ; <i1> [#uses=1] + ret i1 %c +} + +define i32 @test4(i32 %A) { + %B = bitcast i32 %A to i32 ; <i32> [#uses=1] + %C = shl i32 %B, 2 ; <i32> [#uses=1] + %D = bitcast i32 %C to i32 ; <i32> [#uses=1] + ret i32 %D +} + +define i16 @test5(i16 %A) { + %B = sext i16 %A to i32 ; <i32> [#uses=1] + %C = and i32 %B, 15 ; <i32> [#uses=1] + %D = trunc i32 %C to i16 ; <i16> [#uses=1] + ret i16 %D +} + +define i1 @test6(i1 %A) { + %B = zext i1 %A to i32 ; <i32> [#uses=1] + %C = icmp ne i32 %B, 0 ; <i1> [#uses=1] + ret i1 %C +} + +define i1 @test6a(i1 %A) { + %B = zext i1 %A to i32 ; <i32> [#uses=1] + %C = icmp ne i32 %B, -1 ; <i1> [#uses=1] + ret i1 %C +} + +define i1 @test7(i8* %A) { + %B = bitcast i8* %A to i32* ; <i32*> [#uses=1] + %C = icmp eq i32* %B, null ; <i1> [#uses=1] + ret i1 %C +} |