| ; RUN: opt < %s -constprop -S | FileCheck %s |
| |
| ; Overflow on a float to int or int to float conversion is undefined (PR21130). |
| |
| define i8 @overflow_fptosi() { |
| ; CHECK-LABEL: @overflow_fptosi( |
| ; CHECK-NEXT: ret i8 undef |
| ; |
| %i = fptosi double 1.56e+02 to i8 |
| ret i8 %i |
| } |
| |
| define i8 @overflow_fptoui() { |
| ; CHECK-LABEL: @overflow_fptoui( |
| ; CHECK-NEXT: ret i8 undef |
| ; |
| %i = fptoui double 2.56e+02 to i8 |
| ret i8 %i |
| } |
| |
| ; The maximum float is approximately 2 ** 128 which is 3.4E38. |
| ; The constant below is 4E38. Use a 130 bit integer to hold that |
| ; number; 129-bits for the value + 1 bit for the sign. |
| |
| define float @overflow_uitofp() { |
| ; CHECK-LABEL: @overflow_uitofp( |
| ; CHECK-NEXT: ret float 0x7FF0000000000000 |
| ; |
| %i = uitofp i130 400000000000000000000000000000000000000 to float |
| ret float %i |
| } |
| |
| define float @overflow_sitofp() { |
| ; CHECK-LABEL: @overflow_sitofp( |
| ; CHECK-NEXT: ret float 0x7FF0000000000000 |
| ; |
| %i = sitofp i130 400000000000000000000000000000000000000 to float |
| ret float %i |
| } |
| |
