http://llvm.org/bugs/show_bug.cgi?id=16711
Bug ID: 16711
Summary: Multiple identical floating point constants emitted.
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
clang -O3 emits two copies of the constant `42.0f` for this code:
float user1(float F) {
return F * 42.0f;
}
float user2(float F) {
return F * 42.0f;
}
output:
[...]
LCPI0_0:
.long 1109917696 ## float 42
[...]
mulss LCPI0_0(%rip), %xmm0
[...]
LCPI1_0:
.long 1109917696 ## float 42
[...]
mulss LCPI1_0(%rip), %xmm0
[...]
For 3 functions, 3 copies of the constant are emitted, etc. The constants ought
to be uniqued.
`-arch armv7` also seems to experience the same issue.
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