https://llvm.org/bugs/show_bug.cgi?id=29126
Bug ID: 29126
Summary: [InstCombine] fold insertelement of constant into
shufflevector with constant operand
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
define <4 x float> @goo(<4 x float> %x) {
%shuf = shufflevector <4 x float> %x, <4 x float> <float undef, float 1.0,
float 2.0, float undef>, <4 x i32><i32 0, i32 5, i32 6, i32 3>
%ins = insertelement <4 x float> %shuf, float 3.0, i32 3
ret <4 x float> %ins
}
The insert constant should combine with the shuffle constant:
define <4 x float> @hoo(<4 x float> %x) {
%shuf = shufflevector <4 x float> %x, <4 x float> <float undef, float 1.0,
float 2.0, float 3.0>, <4 x i32><i32 0, i32 5, i32 6, i32 7>
ret <4 x float> %shuf
}
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