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Refine fix to bug 15041.

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Thanks to help from Nadav and Hal, I have a more reasonable (and even
correct!) approach.  This specifically penalizes the insertelement
and extractelement operations for the performance hit that will occur
on PowerPC processors.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174725 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Schmidt
2013-02-08 18:19:17 +00:00
parent 33daeab1bb
commit 0f58dbae4a
2 changed files with 31 additions and 16 deletions
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16
test/Analysis/CostModel/PowerPC/insert_extract.ll Normal file
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@@ -0,0 +1,16 @@
; RUN: opt < %s -cost-model -analyze -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck %s
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"
define i32 @insert(i32 %arg) {
; CHECK: cost of 13 {{.*}} insertelement
%x = insertelement <4 x i32> undef, i32 %arg, i32 0
ret i32 undef
}
define i32 @extract(<4 x i32> %arg) {
; CHECK: cost of 13 {{.*}} extractelement
%x = extractelement <4 x i32> %arg, i32 0
ret i32 %x
}