mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
4008b8e3dc
FCmp behaves a lot like a floating-point binary operator in many ways, and can benefit from fast-math information. Flags such as nsz and nnan can affect if this fcmp (in combination with a select) can be treated as a fminnum/fmaxnum operation. This adds backwards-compatible bitcode support, IR parsing and writing, LangRef changes and IRBuilder changes. I'll need to audit InstSimplify and InstCombine in a followup to find places where flags should be copied. llvm-svn: 241901
24 lines
690 B
LLVM
24 lines
690 B
LLVM
; RUN: llvm-as < %s | llvm-dis > %t0
|
|
; RUN: opt -S < %s > %t1
|
|
; RUN: diff %t0 %t1
|
|
; RUN: FileCheck < %t1 %s
|
|
|
|
; Make sure flags on fcmp instructions are serialized/deserialized properly.
|
|
|
|
define i1 @foo(float %a, float %b, double %c, double %d) {
|
|
; CHECK: %plain = fcmp ueq float %a, %b
|
|
%plain = fcmp ueq float %a, %b
|
|
; CHECK: %fast = fcmp fast olt float %a, %b
|
|
%fast = fcmp fast olt float %a, %b
|
|
; CHECK: %nsz = fcmp nsz uge float %a, %b
|
|
%nsz = fcmp nsz uge float %a, %b
|
|
; CHECK: %nnan = fcmp nnan nsz oge double %c, %d
|
|
%nnan = fcmp nnan nsz oge double %c, %d
|
|
|
|
%dce1 = or i1 %plain, %fast
|
|
%dce2 = or i1 %dce1, %nsz
|
|
%dce3 = or i1 %dce2, %nnan
|
|
|
|
ret i1 %dce3
|
|
}
|