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; RUN: opt < %s -passes=libcalls-shrinkwrap -S | FileCheck %s
; #include <math.h>
; #include <fenv.h>
; #include <stdlib.h>
;
; void() {
; volatile double d;
; d = __builtin_nan ("");
; feclearexcept (FE_ALL_EXCEPT);
; acos(d);
; if (fetestexcept (FE_ALL_EXCEPT)) // expect no fp exception raised
; abort();
; }
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define void @test_quiet_nan() {
%1 = alloca double, align 8
store volatile double 0x7FF8000000000000, ptr %1, align 8
%2 = tail call i32 @feclearexcept(i32 noundef 61)
%3 = load volatile double, ptr %1, align 8
%4 = call double @acos(double noundef %3)
; CHECK: [[COND1:%[0-9]+]] = fcmp ogt double [[VALUE:%.*]], 1.000000e+00
; CHECK: [[COND1:%[0-9]+]] = fcmp olt double [[VALUE]], -1.000000e+00
%5 = call i32 @fetestexcept(i32 noundef 61)
%6 = icmp ne i32 %5, 0
br i1 %6, label %abort, label %ret
abort:
call void @abort()
unreachable
ret:
ret void
}
define void @test_quiet_nan_strictfp() strictfp {
%1 = alloca double, align 8
store volatile double 0x7FF8000000000000, ptr %1, align 8
%2 = tail call i32 @feclearexcept(i32 noundef 61)
%3 = load volatile double, ptr %1, align 8
%4 = call double @acos(double noundef %3)
; Generate constrained fcmp if function has strictfp attribute.
; That avoids raising fp exception with quiet nan input.
; CHECK: [[COND1:%[0-9]+]] = call i1 @llvm.experimental.constrained.fcmp.f64(double [[VALUE]], double 1.000000e+00, metadata !"ogt", metadata !"fpexcept.strict") #0
; CHECK: [[COND1:%[0-9]+]] = call i1 @llvm.experimental.constrained.fcmp.f64(double [[VALUE]], double -1.000000e+00, metadata !"olt", metadata !"fpexcept.strict") #0
%5 = call i32 @fetestexcept(i32 noundef 61)
%6 = icmp ne i32 %5, 0
br i1 %6, label %abort, label %ret
abort:
call void @abort()
unreachable
ret:
ret void
}
declare i32 @feclearexcept(i32 noundef)
declare i32 @fetestexcept(i32 noundef)
declare double @acos(double noundef)
declare void @abort()
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