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| author | Raul E. Silvera <rsilvera@google.com> | 2014-03-10 22:59:13 +0000 |
|---|---|---|
| committer | Raul E. Silvera <rsilvera@google.com> | 2014-03-10 22:59:13 +0000 |
| commit | ce376c0fcb8548b980257d30d43164c4a63f70ad (patch) | |
| tree | 4674402872cdebcb5ba78a4aa3e54a8e5689666d /llvm/test/Analysis/CostModel/X86/scalarize.ll | |
| parent | 92aa8c220af260b5f4792f059549cb0ce7ef0a4d (diff) | |
| download | bcm5719-llvm-ce376c0fcb8548b980257d30d43164c4a63f70ad.tar.gz bcm5719-llvm-ce376c0fcb8548b980257d30d43164c4a63f70ad.zip | |
When analyzing vectors of element type that require legalization,
the legalization cost must be included to get an accurate
estimation of the total cost of the scalarized vector.
The inaccurate cost triggered unprofitable SLP vectorization on
32-bit X86.
Summary:
Include legalization overhead when computing scalarization cost
Reviewers: hfinkel, nadav
CC: chandlerc, rnk, llvm-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D2992
llvm-svn: 203509
Diffstat (limited to 'llvm/test/Analysis/CostModel/X86/scalarize.ll')
| -rw-r--r-- | llvm/test/Analysis/CostModel/X86/scalarize.ll | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/llvm/test/Analysis/CostModel/X86/scalarize.ll b/llvm/test/Analysis/CostModel/X86/scalarize.ll new file mode 100644 index 00000000000..fc25fcbc563 --- /dev/null +++ b/llvm/test/Analysis/CostModel/X86/scalarize.ll @@ -0,0 +1,41 @@ +; RUN: opt < %s -cost-model -analyze -mtriple=i386 -mcpu=corei7-avx | FileCheck %s -check-prefix=CHECK32 +; RUN: opt < %s -cost-model -analyze -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s -check-prefix=CHECK64 + +; Test vector scalarization costs. +; RUN: llc < %s -march=x86 -mcpu=i386 +; RUN: llc < %s -march=x86 -mcpu=yonah + +%i4 = type <4 x i32> +%i8 = type <2 x i64> + +;;; TEST HANDLING OF VARIOUS VECTOR SIZES + +declare %i4 @llvm.bswap.v4i32(%i4) +declare %i8 @llvm.bswap.v2i64(%i8) + +declare %i4 @llvm.ctpop.v4i32(%i4) +declare %i8 @llvm.ctpop.v2i64(%i8) + +; CHECK32-LABEL: test_scalarized_intrinsics +; CHECK64-LABEL: test_scalarized_intrinsics +define void @test_scalarized_intrinsics() { + %r1 = add %i8 undef, undef + +; CHECK32: cost of 12 {{.*}}bswap.v4i32 +; CHECK64: cost of 12 {{.*}}bswap.v4i32 + %r2 = call %i4 @llvm.bswap.v4i32(%i4 undef) +; CHECK32: cost of 10 {{.*}}bswap.v2i64 +; CHECK64: cost of 6 {{.*}}bswap.v2i64 + %r3 = call %i8 @llvm.bswap.v2i64(%i8 undef) + +; CHECK32: cost of 12 {{.*}}ctpop.v4i32 +; CHECK64: cost of 12 {{.*}}ctpop.v4i32 + %r4 = call %i4 @llvm.ctpop.v4i32(%i4 undef) +; CHECK32: cost of 10 {{.*}}ctpop.v2i64 +; CHECK64: cost of 6 {{.*}}ctpop.v2i64 + %r5 = call %i8 @llvm.ctpop.v2i64(%i8 undef) + +; CHECK32: ret +; CHECK64: ret + ret void +} |
