[NFC][Msan] Add llvm.fabs test

llvm.fabs does not need a special handler as llvm.abs as its
single argument type match the return type.

Author: vitalybuka

llvm/test/Instrumentation/MemorySanitizer/abs-vector.ll

@@ -1,8 +1,8 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -S -msan-check-access-address=0 -passes=msan 2>&1 | FileCheck %s
-; RUN: opt < %s -S -msan-check-access-address=0 -msan | FileCheck %s
-; RUN: opt < %s -S -msan-check-access-address=0 -msan-track-origins=2 -passes=msan 2>&1 | FileCheck %s --check-prefixes=CHECK,ORIGIN
-; RUN: opt < %s -S -msan-check-access-address=0 -msan-track-origins=2 -msan | FileCheck %s --check-prefixes=CHECK,ORIGIN
+; RUN: opt %s -S -msan-check-access-address=0 -passes=msan 2>&1 | FileCheck %s
+; RUN: opt %s -S -msan-check-access-address=0 -msan | FileCheck %s
+; RUN: opt %s -S -msan-check-access-address=0 -msan-track-origins=2 -passes=msan 2>&1 | FileCheck %s --check-prefixes=CHECK,ORIGIN
+; RUN: opt %s -S -msan-check-access-address=0 -msan-track-origins=2 -msan | FileCheck %s --check-prefixes=CHECK,ORIGIN
 
 target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"
@@ -73,9 +73,26 @@ entry:
   ret <4 x i64> %2
 }
 
+define <4 x double> @test_fabs(<4 x double> %a) local_unnamed_addr #0 {
+; CHECK-LABEL: @test_fabs(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[TMP0:%.*]] = load <4 x i64>, <4 x i64>* bitcast ([100 x i64]* @__msan_param_tls to <4 x i64>*), align 8
+; ORIGIN-NEXT:   [[TMP1:%.*]] = load i32, i32* getelementptr inbounds ([200 x i32], [200 x i32]* @__msan_param_origin_tls, i32 0, i32 0), align 4
+; CHECK:         call void @llvm.donothing()
+; CHECK-NEXT:    [[TMP2:%.*]] = tail call <4 x double> @llvm.fabs.v4f64(<4 x double> [[A:%.*]])
+; CHECK-NEXT:    store <4 x i64> [[TMP0]], <4 x i64>* bitcast ([100 x i64]* @__msan_retval_tls to <4 x i64>*), align 8
+; ORIGIN-NEXT:   store i32 [[TMP1]], i32* @__msan_retval_origin_tls, align 4
+; CHECK:         ret <4 x double> [[TMP2]]
+;
+entry:
+  %0 = tail call <4 x double> @llvm.fabs.v4f64(<4 x double> %a)
+  ret <4 x double> %0
+}
+
 declare <32 x i8> @llvm.abs.v32i8(<32 x i8>, i1 immarg) #1
 declare <16 x i16> @llvm.abs.v16i16(<16 x i16>, i1 immarg) #1
 declare <8 x i32> @llvm.abs.v8i32(<8 x i32>, i1 immarg) #1
+declare <4 x double> @llvm.fabs.v4f64(<4 x double>) #1
 
 attributes #0 = { nounwind readnone sanitize_memory }
 attributes #1 = { nounwind readnone speculatable willreturn }