http://llvm.org/bugs/show_bug.cgi?id=3219
Summary: fails to inline sqrt
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Backend: X86
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
On this program:
#include <math.h>
double foo(double X) { return sqrt(X); }
GCC will inline the fast path (non-negative X) and produce this:
foo:
pushl %ebp
movl %esp, %ebp
subl $8, %esp
fldl 8(%ebp)
fld %st(0)
fsqrt
fucomi %st(0), %st
jp .L7
je .L8
fstp %st(0)
jmp .L5
.L7:
fstp %st(0)
.p2align 4,,7
.p2align 3
.L5:
fstpl (%esp)
.p2align 4,,5
.p2align 3
call sqrt
.p2align 4,,2
.p2align 3
jmp .L2
.p2align 4,,7
.p2align 3
.L8:
fstp %st(1)
.L2:
leave
.p2align 4,,1
.p2align 3
ret
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