Mercurial > hg > CbC > CbC_llvm
diff test/CodeGen/X86/extractelement-load.ll @ 83:60c9769439b8 LLVM3.7
LLVM 3.7
author | Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp> |
---|---|
date | Wed, 18 Feb 2015 14:55:36 +0900 |
parents | 54457678186b |
children | afa8332a0e37 |
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--- a/test/CodeGen/X86/extractelement-load.ll Mon Sep 08 22:07:30 2014 +0900 +++ b/test/CodeGen/X86/extractelement-load.ll Wed Feb 18 14:55:36 2015 +0900 @@ -1,5 +1,6 @@ ; RUN: llc < %s -march=x86 -mattr=+sse2 -mcpu=yonah | FileCheck %s ; RUN: llc < %s -march=x86-64 -mattr=+sse2 -mcpu=core2 | FileCheck %s +; RUN: llc < %s -march=x86-64 -mattr=+avx -mcpu=btver2 | FileCheck %s target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" @@ -29,14 +30,15 @@ ; This case could easily end up inf-looping in the DAG combiner due to an ; low alignment load of the vector which prevents us from reliably forming a ; narrow load. -; FIXME: It would be nice to detect whether the target has fast and legal -; unaligned loads and use them here. + +; The expected codegen is identical for the AVX case except +; load/store instructions will have a leading 'v', so we don't +; need to special-case the checks. + define void @t3() { ; CHECK-LABEL: t3: -; -; This movs the entire vector, shuffling the high double down. If we fixed the -; FIXME above it would just move the high double directly. -; CHECK: movhpd %xmm +; CHECK: movupd +; CHECK: movhpd bb: %tmp13 = load <2 x double>* undef, align 1 @@ -44,3 +46,19 @@ store double %.sroa.3.24.vec.extract, double* undef, align 8 unreachable } + +; Case where a load is unary shuffled, then bitcast (to a type with the same +; number of elements) before extractelement. +; This is testing for an assertion - the extraction was assuming that the undef +; second shuffle operand was a post-bitcast type instead of a pre-bitcast type. +define i64 @t4(<2 x double>* %a) { +; CHECK-LABEL: t4: +; CHECK: mov +; CHECK: ret + %b = load <2 x double>* %a, align 16 + %c = shufflevector <2 x double> %b, <2 x double> %b, <2 x i32> <i32 1, i32 0> + %d = bitcast <2 x double> %c to <2 x i64> + %e = extractelement <2 x i64> %d, i32 1 + ret i64 %e +} +