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Diffstat (limited to 'test/CodeGen/X86/extractelement-load.ll')
| -rw-r--r-- | test/CodeGen/X86/extractelement-load.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/test/CodeGen/X86/extractelement-load.ll b/test/CodeGen/X86/extractelement-load.ll index cadc0fb..8647599 100644 --- a/test/CodeGen/X86/extractelement-load.ll +++ b/test/CodeGen/X86/extractelement-load.ll @@ -1,6 +1,8 @@ ; RUN: llc < %s -march=x86 -mattr=+sse2 -mcpu=yonah | FileCheck %s ; RUN: llc < %s -march=x86-64 -mattr=+sse2 -mcpu=core2 | FileCheck %s +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" + define i32 @t(<2 x i64>* %val) nounwind { ; CHECK-LABEL: t: ; CHECK-NOT: movd @@ -23,3 +25,40 @@ undef, i32 7, i32 9, i32 undef, i32 13, i32 15, i32 1, i32 3> %y = extractelement <8 x i32> %Shuff68, i32 0 ret i32 %y } + +; 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. +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: movupd +; CHECK: shufpd +; CHECK: movlpd + +bb: + %tmp13 = load <2 x double>* undef, align 1 + %.sroa.3.24.vec.extract = extractelement <2 x double> %tmp13, i32 1 + 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 +} + |