https://bugs.llvm.org/show_bug.cgi?id=50308
Bug ID: 50308
Summary: compile-time explosion at -O1 to -Os in Clang-12 and
Clang-trunk versions
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Hi all,
Clang-12 and Clang-trunk versions spend infinite time to compile the following
short valid C program (under -O1 to -Os).
$cat small.c
#include <stdint.h>
int ui_2, s_3, ui_5;
void fn1(int i_8) {
uint32_t *ptr_14 = &ui_5;
int16_t *ptr_16 = ui_2 -= i_8 ? (ui_5 <= *ptr_14) + (1 + s_3 ^ ui_2) :
*ptr_16;
}
Reproduced in Godbolt: https://godbolt.org/z/eYnxhM6Me
Thanks,
Haoxin
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