Refactor and check "onlyReadsMemory" before optimizing builtins.

This patch is mostly just refactoring a bunch of copy-and-pasted code, but
it also adds a check that the call instructions are readnone or readonly.
That check was already present for sin, cos, sqrt, log2, and exp2 calls, but
it was missing for the rest of the builtins being handled in this code.

llvm-svn: 161282

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/test/CodeGen/ARM/fparith.ll b/llvm/test/CodeGen/ARM/fparith.ll
index ce6d6b29e9d..a8bae3b9519 100644
--- a/llvm/test/CodeGen/ARM/fparith.ll
+++ b/llvm/test/CodeGen/ARM/fparith.ll
@@ -84,7 +84,7 @@ define float @f11(float %a) {
 ;CHECK: f11:
 ;CHECK: bic
 entry:
-	%tmp1 = call float @fabsf( float %a )		; <float> [#uses=1]
+	%tmp1 = call float @fabsf( float %a ) readnone	; <float> [#uses=1]
 	ret float %tmp1
 }
 
@@ -94,7 +94,7 @@ define double @f12(double %a) {
 ;CHECK: f12:
 ;CHECK: vabs.f64
 entry:
-	%tmp1 = call double @fabs( double %a )		; <double> [#uses=1]
+	%tmp1 = call double @fabs( double %a ) readnone	; <double> [#uses=1]
 	ret double %tmp1
 }