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PPC: Combine duplicate (offset) lvsl Altivec intrinsics

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The lvsl permutation control instruction is a function only of the alignment of
the pointer operand (relative to the 16-byte natural alignment of Altivec
vectors). As a result, multiple lvsl intrinsics where the operands differ by a
multiple of 16 can be combined.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182708 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2013-05-25 04:05:05 +00:00
parent 81349a7435
commit 5a0e60425f
2 changed files with 34 additions and 1 deletions
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6
test/CodeGen/PowerPC/unal-altivec.ll
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@@ -1,4 +1,5 @@
; RUN: llc < %s -mcpu=g5 | FileCheck %s
; RUN: llc < %s -mcpu=g5 | FileCheck %s -check-prefix=CHECK-PC
target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
@@ -38,6 +39,11 @@ vector.body: ; preds = %vector.body, %vecto
; CHECK: vaddfp {{[0-9]+}}, [[R1]], [[CNST]]
; CHECK: blr
; CHECK-PC: @foo
; CHECK-PC: lvsl
; CHECK-PC-NOT: lvsl
; CHECK-PC: blr
for.end: ; preds = %vector.body
ret void
}