File: constantexpr-fneg.c

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (21 lines) | stat: -rw-r--r-- 708 bytes parent folder | download | duplicates (4) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
// RUN: %clang_cc1 -emit-llvm-bc -disable-llvm-passes -o %t.bc %s
// RUN: llvm-dis %t.bc -o - | FileCheck %s

// Test case for PR45426. Make sure we do not crash while writing bitcode
// containing a simplify-able fneg constant expression.
//
// CHECK-LABEL define i32 @main()
// CHECK:      entry:
// CHECK-NEXT:   %retval = alloca i32
// CHECK-NEXT:   store i32 0, ptr %retval
// CHECK-NEXT:   [[LV:%.*]] = load ptr, ptr @c
// CHECK-NEXT:   store float 1.000000e+00, ptr [[LV]], align 4
// CHECK-NEXT:   [[FNEG:%.*]] = fneg float 1.000000e+00
// CHECK-NEXT:   [[CONV:%.*]] = fptosi float [[FNEG]] to i32
// CHECK-NEXT:   ret i32 [[CONV]]

int a[], b;
float *c;
int main(void) {
  return -(*c = &b != a);
}