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; 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
}
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