SimplifyLibcalls: Add fabs and trunc to the list of libcalls that are safe to shrink...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162173 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index f110320c1bf9943afd7d63e6dce526643b10cb50..39044190128debd223ef21b9a17dc2fb80c8fe0c 100644 (file)
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -1641,6 +1641,8 @@ void SimplifyLibCalls::InitOptimizations() {
   Optimizations["llvm.exp2.f64"] = &Exp2;
   Optimizations["llvm.exp2.f32"] = &Exp2;
 
+  if (TLI->has(LibFunc::fabs) && TLI->has(LibFunc::fabsf))
+    Optimizations["fabs"] = &UnaryDoubleFP;
   if (TLI->has(LibFunc::floor) && TLI->has(LibFunc::floorf))
     Optimizations["floor"] = &UnaryDoubleFP;
   if (TLI->has(LibFunc::ceil) && TLI->has(LibFunc::ceilf))
@@ -1651,6 +1653,8 @@ void SimplifyLibCalls::InitOptimizations() {
     Optimizations["rint"] = &UnaryDoubleFP;
   if (TLI->has(LibFunc::nearbyint) && TLI->has(LibFunc::nearbyintf))
     Optimizations["nearbyint"] = &UnaryDoubleFP;
+  if (TLI->has(LibFunc::trunc) && TLI->has(LibFunc::truncf))
+    Optimizations["trunc"] = &UnaryDoubleFP;
 
   // Integer Optimizations
   Optimizations["ffs"] = &FFS;

diff --git a/test/Transforms/SimplifyLibCalls/floor.ll b/test/Transforms/SimplifyLibCalls/floor.ll
index 03dcdf585f9a742681b4a431536da704aebdf24c..93c62c20023dbadd49c4a1a1db0b200db72b1279 100644 (file)
--- a/test/Transforms/SimplifyLibCalls/floor.ll
+++ b/test/Transforms/SimplifyLibCalls/floor.ll
@@ -9,6 +9,8 @@
 ; DO-SIMPLIFY: call float @ceilf(
 ; DO-SIMPLIFY: call float @roundf(
 ; DO-SIMPLIFY: call float @nearbyintf(
+; DO-SIMPLIFY: call float @truncf(
+; DO-SIMPLIFY: call float @fabsf(
 
 ; C89-SIMPLIFY: call float @floorf(
 ; C89-SIMPLIFY: call float @ceilf(
@@ -19,6 +21,8 @@
 ; DONT-SIMPLIFY: call double @ceil(
 ; DONT-SIMPLIFY: call double @round(
 ; DONT-SIMPLIFY: call double @nearbyint(
+; DONT-SIMPLIFY: call double @trunc(
+; DONT-SIMPLIFY: call double @fabs(
 
 declare double @floor(double)
 
@@ -28,6 +32,10 @@ declare double @round(double)
 
 declare double @nearbyint(double)
 
+declare double @trunc(double)
+
+declare double @fabs(double)
+
 define float @test_floor(float %C) {
        %D = fpext float %C to double           ; <double> [#uses=1]
         ; --> floorf
@@ -60,3 +68,18 @@ define float @test_nearbyint(float %C) {
        ret float %F
 }
 
+define float @test_trunc(float %C) {
+       %D = fpext float %C to double
+       ; --> truncf
+        %E = call double @trunc(double %D)
+       %F = fptrunc double %E to float
+       ret float %F
+}
+
+define float @test_fabs(float %C) {
+       %D = fpext float %C to double
+       ; --> fabsf
+        %E = call double @fabs(double %D)
+       %F = fptrunc double %E to float
+       ret float %F
+}