mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
b86cbf7581
This commit introduces a set of experimental intrinsics intended to prevent optimizations that make assumptions about the rounding mode and floating point exception behavior. These intrinsics will later be extended to specify flush-to-zero behavior. More work is also required to model instruction dependencies in machine code and to generate these instructions from clang (when required by pragmas and/or command line options that are not currently supported). Differential Revision: https://reviews.llvm.org/D27028 llvm-svn: 293226
44 lines
2.1 KiB
LLVM
44 lines
2.1 KiB
LLVM
; RUN: opt -verify -S < %s 2>&1 | FileCheck --check-prefix=CHECK1 %s
|
|
; RUN: sed -e s/.T2:// %s | not opt -verify -disable-output 2>&1 | FileCheck --check-prefix=CHECK2 %s
|
|
; RUN: sed -e s/.T3:// %s | not opt -verify -disable-output 2>&1 | FileCheck --check-prefix=CHECK3 %s
|
|
|
|
; Common declaration used for all runs.
|
|
declare double @llvm.experimental.constrained.fadd.f64(double, double, metadata, metadata)
|
|
|
|
; Test that the verifier accepts legal code, and that the correct attributes are
|
|
; attached to the FP intrinsic.
|
|
; CHECK1: declare double @llvm.experimental.constrained.fadd.f64(double, double, metadata, metadata) #[[ATTR:[0-9]+]]
|
|
; CHECK1: attributes #[[ATTR]] = { inaccessiblememonly nounwind }
|
|
; Note: FP exceptions aren't usually caught through normal unwind mechanisms,
|
|
; but we may want to revisit this for asynchronous exception handling.
|
|
define double @f1(double %a, double %b) {
|
|
entry:
|
|
%fadd = call double @llvm.experimental.constrained.fadd.f64(
|
|
double %a, double %b,
|
|
metadata !"round.dynamic",
|
|
metadata !"fpexcept.strict")
|
|
ret double %fadd
|
|
}
|
|
|
|
; Test an illegal value for the rounding mode argument.
|
|
; CHECK2: invalid rounding mode argument
|
|
;T2: define double @f2(double %a, double %b) {
|
|
;T2: entry:
|
|
;T2: %fadd = call double @llvm.experimental.constrained.fadd.f64(
|
|
;T2: double %a, double %b,
|
|
;T2: metadata !"round.dynomite",
|
|
;T2: metadata !"fpexcept.strict")
|
|
;T2: ret double %fadd
|
|
;T2: }
|
|
|
|
; Test an illegal value for the exception behavior argument.
|
|
; CHECK3: invalid exception behavior argument
|
|
;T3: define double @f2(double %a, double %b) {
|
|
;T3: entry:
|
|
;T3: %fadd = call double @llvm.experimental.constrained.fadd.f64(
|
|
;T3: double %a, double %b,
|
|
;T3: metadata !"round.dynamic",
|
|
;T3: metadata !"fpexcept.restrict")
|
|
;T3: ret double %fadd
|
|
;T3: }
|