From e177c5a00da34ba61b762e2b32bd96e33b0c10b4 Mon Sep 17 00:00:00 2001 From: Sanjay Patel Date: Tue, 26 Nov 2019 17:35:10 -0500 Subject: [InstSimplify] fold copysign with same args to the arg This is correct for any value including NaN/inf. We don't have this fold directly in the backend either, but x86 manages to get it after converting things to bitops. --- llvm/test/Transforms/InstSimplify/call.ll | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'llvm/test/Transforms') diff --git a/llvm/test/Transforms/InstSimplify/call.ll b/llvm/test/Transforms/InstSimplify/call.ll index b0f35ab3715..4736adb972d 100644 --- a/llvm/test/Transforms/InstSimplify/call.ll +++ b/llvm/test/Transforms/InstSimplify/call.ll @@ -926,8 +926,7 @@ declare <2 x double> @llvm.copysign.v2f64(<2 x double>, <2 x double>) define float @copysign_same_operand(float %x) { ; CHECK-LABEL: @copysign_same_operand( -; CHECK-NEXT: [[R:%.*]] = call float @llvm.copysign.f32(float [[X:%.*]], float [[X]]) -; CHECK-NEXT: ret float [[R]] +; CHECK-NEXT: ret float [[X:%.*]] ; %r = call float @llvm.copysign.f32(float %x, float %x) ret float %r @@ -935,8 +934,7 @@ define float @copysign_same_operand(float %x) { define <2 x double> @copysign_same_operand_vec(<2 x double> %x) { ; CHECK-LABEL: @copysign_same_operand_vec( -; CHECK-NEXT: [[R:%.*]] = call <2 x double> @llvm.copysign.v2f64(<2 x double> [[X:%.*]], <2 x double> [[X]]) -; CHECK-NEXT: ret <2 x double> [[R]] +; CHECK-NEXT: ret <2 x double> [[X:%.*]] ; %r = call <2 x double> @llvm.copysign.v2f64(<2 x double> %x, <2 x double> %x) ret <2 x double> %r -- cgit v1.2.3