https://bugs.llvm.org/show_bug.cgi?id=47428
Bug ID: 47428
Summary: Opportunity to simplify conditions
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: david.bolvan...@gmail.com
CC: llvm-bugs@lists.llvm.org
void bar (void);
void
foo (int a)
{
if (a < 100)
return;
if (200 < a)
return;
if (a - 10 > 150)
bar ();
}
Clang:
foo(int): # @foo(int)
cmp edi, 161
jl .LBB0_2
add edi, -100
cmp edi, 100
ja .LBB0_2
jmp bar() # TAILCALL
.LBB0_2:
ret
GCC:
foo(int):
sub edi, 161
cmp edi, 39
jbe .L4
ret
.L4:
jmp bar()
Maybe CE pass can simplify this code?
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