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Cost Model: change the default cost of control flow instructions (br / ret / ...) to zero.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169423 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem 2012-12-05 21:21:26 +00:00
parent f2a1c83c86
commit 0602bb4659
7 changed files with 10 additions and 10 deletions
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2
lib/Target/TargetTransformImpl.cpp
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@ -283,7 +283,7 @@ unsigned VectorTargetTransformImpl::getCastInstrCost(unsigned Opcode, Type *Dst,
}
unsigned VectorTargetTransformImpl::getCFInstrCost(unsigned Opcode) const {
return 1;
return 0;
}
unsigned VectorTargetTransformImpl::getCmpSelInstrCost(unsigned Opcode,

4
test/Analysis/CostModel/X86/arith.ll
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@ -14,7 +14,7 @@ define i32 @add(i32 %arg) {
%D = add <4 x i64> undef, undef
;CHECK: cost of 8 {{.*}} add
%E = add <8 x i64> undef, undef
;CHECK: cost of 1 {{.*}} ret
;CHECK: cost of 0 {{.*}} ret
ret i32 undef
}
@ -28,7 +28,7 @@ define i32 @xor(i32 %arg) {
%C = xor <2 x i64> undef, undef
;CHECK: cost of 1 {{.*}} xor
%D = xor <4 x i64> undef, undef
;CHECK: cost of 1 {{.*}} ret
;CHECK: cost of 0 {{.*}} ret
ret i32 undef
}

2
test/Analysis/CostModel/X86/cast.ll
View File

@ -28,7 +28,7 @@ define i32 @add(i32 %arg) {
;CHECK: cost of 0 {{.*}} trunc
%H = trunc i32 undef to i1
;CHECK: cost of 1 {{.*}} ret
;CHECK: cost of 0 {{.*}} ret
ret i32 undef
}

2
test/Analysis/CostModel/X86/cmp.ll
View File

@ -35,7 +35,7 @@ define i32 @cmp(i32 %arg) {
;CHECK: cost of 4 {{.*}} icmp
%M = icmp eq <32 x i8> undef, undef
;CHECK: cost of 1 {{.*}} ret
;CHECK: cost of 0 {{.*}} ret
ret i32 undef
}

2
test/Analysis/CostModel/X86/i32.ll
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@ -2,7 +2,7 @@
;CHECK: cost of 2 {{.*}} add
;CHECK: cost of 1 {{.*}} ret
;CHECK: cost of 0 {{.*}} ret
define i32 @no_info(i32 %arg) {
%e = add i64 undef, undef
ret i32 undef

2
test/Analysis/CostModel/X86/tiny.ll
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@ -4,7 +4,7 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3
target triple = "x86_64-apple-macosx10.8.0"
;CHECK: cost of 1 {{.*}} add
;CHECK: cost of 1 {{.*}} ret
;CHECK: cost of 0 {{.*}} ret
define i32 @no_info(i32 %arg) {
%e = add i32 %arg, %arg
ret i32 %e

6
test/Analysis/CostModel/X86/vectorized-loop.ll
View File

@ -41,7 +41,7 @@ vector.body: ; preds = %for.body.lr.ph, %ve
store <8 x i32> %11, <8 x i32>* %9, align 4
%index.next = add i64 %index, 8
%12 = icmp eq i64 %index.next, %end.idx.rnd.down
;CHECK: cost of 1 {{.*}} br
;CHECK: cost of 0 {{.*}} br
br i1 %12, label %middle.block, label %vector.body
middle.block: ; preds = %vector.body, %for.body.lr.ph
@ -65,11 +65,11 @@ for.body: ; preds = %middle.block, %for.
;CHECK: cost of 0 {{.*}} trunc
%16 = trunc i64 %indvars.iv.next to i32
%cmp = icmp slt i32 %16, %end
;CHECK: cost of 1 {{.*}} br
;CHECK: cost of 0 {{.*}} br
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %middle.block, %for.body, %entry
;CHECK: cost of 1 {{.*}} ret
;CHECK: cost of 0 {{.*}} ret
ret i32 undef
}