[SimplifyLibCalls] Only consider sinpi/cospi functions within the same function

The sinpi/cospi can be replaced with sincospi to remove unnecessary
computations.  However, we need to make sure that the calls are within
the same function!

This fixes PR26993.

llvm-svn: 263875

1 files changed, 24 insertions, 0 deletions

diff --git a/llvm/test/Transforms/InstCombine/pr26993.ll b/llvm/test/Transforms/InstCombine/pr26993.ll
new file mode 100644
index 00000000000..14b33d10cc3
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/pr26993.ll
@@ -0,0 +1,24 @@
+; RUN: opt -instcombine -S < %s | FileCheck %s
+
+define double @test1() {
+  %sin = call double @__sinpi(double 1.0)
+  ret double %sin
+}
+
+; CHECK-LABEL: define double @test1(
+; CHECK: %[[sin:.*]] = call double @__sinpi(double 1.000000e+00)
+; CHECK-NEXT: ret double %[[sin]]
+
+define double @test2() {
+  %cos = call double @__cospi(double 1.0)
+  ret double %cos
+}
+
+; CHECK-LABEL: define double @test2(
+; CHECK: %[[cos:.*]] = call double @__cospi(double 1.000000e+00)
+; CHECK-NEXT: ret double %[[cos]]
+
+declare double @__sinpi(double %x) #0
+declare double @__cospi(double %x) #0
+
+attributes #0 = { readnone nounwind }