From fd8e416879bd204c6c0d52efb4b04d3ac1213632 Mon Sep 17 00:00:00 2001 From: Daniel Sanders Date: Fri, 22 Nov 2013 11:24:50 +0000 Subject: [mips][msa] Float vector constants cannot use ldi.[wd] directly. Bitcast from the appropriate integer vector type. Fixes an instruction selection failure detected by llvm-stress. llvm-svn: 195444 --- .../Mips/msa/llvm-stress-s2501752154-simplified.ll | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 llvm/test/CodeGen/Mips/msa/llvm-stress-s2501752154-simplified.ll (limited to 'llvm/test/CodeGen/Mips') diff --git a/llvm/test/CodeGen/Mips/msa/llvm-stress-s2501752154-simplified.ll b/llvm/test/CodeGen/Mips/msa/llvm-stress-s2501752154-simplified.ll new file mode 100644 index 00000000000..564ad7436d3 --- /dev/null +++ b/llvm/test/CodeGen/Mips/msa/llvm-stress-s2501752154-simplified.ll @@ -0,0 +1,27 @@ +; RUN: llc -march=mips < %s +; RUN: llc -march=mips -mattr=+msa,+fp64 < %s +; RUN: llc -march=mipsel < %s +; RUN: llc -march=mipsel -mattr=+msa,+fp64 < %s + +; This test originally failed for MSA with a "Cannot select ..." error. +; This happened because the legalizer treated undef's in the <4 x float> +; constant as equivalent to the defined elements when checking if it a constant +; splat, but then proceeded to legalize the undef's to zero, leaving it as a +; non-splat that cannot be selected. It should have eliminated the undef's by +; rewriting the splat constant. + +; It should at least successfully build. + +define void @autogen_SD2501752154() { +BB: + %BC = bitcast <4 x i32> to <4 x float> + br label %CF74 + +CF74: ; preds = %CF74, %CF + %E54 = extractelement <1 x i1> undef, i32 0 + br i1 %E54, label %CF74, label %CF79 + +CF79: ; preds = %CF75 + %I63 = insertelement <4 x float> %BC, float undef, i32 0 + ret void +} -- cgit v1.2.3