SimplifyLibCalls: Replace fabs libcalls with intrinsics
Add missing fabs(fpext) optimzation that worked with the call,
and also fixes it creating a second fpext when there were multiple
uses.
llvm-svn: 292172
diff --git a/llvm/test/Transforms/InstCombine/fabs-libcall.ll b/llvm/test/Transforms/InstCombine/fabs-libcall.ll
new file mode 100644
index 0000000..5733bad
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/fabs-libcall.ll
@@ -0,0 +1,21 @@
+; RUN: opt -S -mtriple=i686-apple-macosx -instcombine %s | FileCheck %s
+
+declare x86_fp80 @fabsl(x86_fp80)
+
+; CHECK-LABEL: @replace_fabs_call_f80(
+; CHECK-NEXT: %fabsl = call x86_fp80 @llvm.fabs.f80(x86_fp80 %x)
+; CHECK-NEXT: ret x86_fp80 %fabsl
+define x86_fp80 @replace_fabs_call_f80(x86_fp80 %x) {
+ %fabsl = tail call x86_fp80 @fabsl(x86_fp80 %x)
+ ret x86_fp80 %fabsl
+
+}
+
+; CHECK-LABEL: @fmf_replace_fabs_call_f80(
+; CHECK-NEXT: %fabsl = call nnan x86_fp80 @llvm.fabs.f80(x86_fp80 %x)
+; CHECK-NEXT: ret x86_fp80 %fabsl
+define x86_fp80 @fmf_replace_fabs_call_f80(x86_fp80 %x) {
+ %fabsl = tail call nnan x86_fp80 @fabsl(x86_fp80 %x)
+ ret x86_fp80 %fabsl
+}
+