diff options
Diffstat (limited to 'llvm/test/Transforms/Reassociate/negation.ll')
| -rw-r--r-- | llvm/test/Transforms/Reassociate/negation.ll | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/llvm/test/Transforms/Reassociate/negation.ll b/llvm/test/Transforms/Reassociate/negation.ll new file mode 100644 index 00000000000..f443083ff3f --- /dev/null +++ b/llvm/test/Transforms/Reassociate/negation.ll @@ -0,0 +1,46 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s + +; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z. + +define i32 @test1(i32 %a, i32 %b, i32 %z) { +; CHECK-LABEL: @test1( +; CHECK-NEXT: [[E:%.*]] = mul i32 [[A:%.*]], 12345 +; CHECK-NEXT: [[F:%.*]] = mul i32 [[E]], [[B:%.*]] +; CHECK-NEXT: [[G:%.*]] = mul i32 [[F]], [[Z:%.*]] +; CHECK-NEXT: ret i32 [[G]] +; + %c = sub i32 0, %z + %d = mul i32 %a, %b + %e = mul i32 %c, %d + %f = mul i32 %e, 12345 + %g = sub i32 0, %f + ret i32 %g +} + +define i32 @test2(i32 %a, i32 %b, i32 %z) { +; CHECK-LABEL: @test2( +; CHECK-NEXT: [[E:%.*]] = mul i32 [[A:%.*]], 40 +; CHECK-NEXT: [[F:%.*]] = mul i32 [[E]], [[Z:%.*]] +; CHECK-NEXT: ret i32 [[F]] +; + %d = mul i32 %z, 40 + %c = sub i32 0, %d + %e = mul i32 %a, %c + %f = sub i32 0, %e + ret i32 %f +} + +define <2 x i32> @negate_vec_undefs(<2 x i32> %a, <2 x i32> %b, <2 x i32> %z) { +; CHECK-LABEL: @negate_vec_undefs( +; CHECK-NEXT: [[E:%.*]] = mul <2 x i32> [[A:%.*]], <i32 40, i32 40> +; CHECK-NEXT: [[F:%.*]] = mul <2 x i32> [[E]], [[Z:%.*]] +; CHECK-NEXT: ret <2 x i32> [[F]] +; + %d = mul <2 x i32> %z, <i32 40, i32 40> + %c = sub <2 x i32> <i32 0, i32 undef>, %d + %e = mul <2 x i32> %a, %c + %f = sub <2 x i32> <i32 0, i32 undef>, %e + ret <2 x i32> %f +} + |
