mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
3f624d4650
This change was discussed in D15392. It allows us to remove the fold that was added in: http://reviews.llvm.org/r255261 ...and it will allow us to generalize this fold: http://reviews.llvm.org/rL112232 while preserving the order of bitcast + extract that it produces and testing shows is better handled by the backend. Note that the existing check for "isVectorTy()" wasn't strong enough in general and specifically because: x86_mmx. It's not a vector, but it's not vectorizable either. So here we check VectorType::isValidElementType() directly before proceeding with the transform. llvm-svn: 255433
42 lines
911 B
LLVM
42 lines
911 B
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
define double @a(<1 x i64> %y) {
|
|
%c = bitcast <1 x i64> %y to double
|
|
ret double %c
|
|
|
|
; CHECK-LABEL: @a(
|
|
; CHECK-NEXT: bitcast <1 x i64> %y to <1 x double>
|
|
; CHECK-NEXT: extractelement <1 x double> {{.*}}, i32 0
|
|
; CHECK-NEXT: ret double
|
|
}
|
|
|
|
define i64 @b(<1 x i64> %y) {
|
|
%c = bitcast <1 x i64> %y to i64
|
|
ret i64 %c
|
|
|
|
; CHECK-LABEL: @b(
|
|
; CHECK-NEXT: extractelement <1 x i64> %y, i32 0
|
|
; CHECK-NEXT: ret i64
|
|
}
|
|
|
|
define <1 x i64> @c(double %y) {
|
|
%c = bitcast double %y to <1 x i64>
|
|
ret <1 x i64> %c
|
|
|
|
; CHECK-LABEL: @c(
|
|
; CHECK-NEXT: bitcast double %y to i64
|
|
; CHECK-NEXT: insertelement <1 x i64> undef, i64 {{.*}}, i32 0
|
|
; CHECK-NEXT: ret <1 x i64>
|
|
}
|
|
|
|
define <1 x i64> @d(i64 %y) {
|
|
%c = bitcast i64 %y to <1 x i64>
|
|
ret <1 x i64> %c
|
|
|
|
; CHECK-LABEL: @d(
|
|
; CHECK-NEXT: insertelement <1 x i64> undef, i64 %y, i32 0
|
|
; CHECK-NEXT: ret <1 x i64>
|
|
}
|
|
|
|
|