Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

external/llvm/test/Transforms/InstCombine/cos-1.ll

@@ -0,0 +1,38 @@
+; Test that the cos library call simplifier works correctly.
+;
+; RUN: opt < %s -instcombine -S | FileCheck %s -check-prefix=NO-FLOAT-SHRINK
+; RUN: opt < %s -instcombine -enable-double-float-shrink -S | FileCheck %s -check-prefix=DO-FLOAT-SHRINK
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+
+declare double @cos(double)
+
+; Check cos(-x) -> cos(x);
+
+define double @test_simplify1(double %d) {
+; NO-FLOAT-SHRINK-LABEL: @test_simplify1(
+  %neg = fsub double -0.000000e+00, %d
+  %cos = call double @cos(double %neg)
+; NO-FLOAT-SHRINK: call double @cos(double %d)
+  ret double %cos
+}
+
+define float @test_simplify2(float %f) {
+; DO-FLOAT-SHRINK-LABEL: @test_simplify2(
+  %conv1 = fpext float %f to double
+  %neg = fsub double -0.000000e+00, %conv1
+  %cos = call double @cos(double %neg)
+  %conv2 = fptrunc double %cos to float
+; DO-FLOAT-SHRINK: call float @cosf(float %f)
+  ret float %conv2
+}
+
+define float @test_simplify3(float %f) {
+; NO-FLOAT-SHRINK-LABEL: @test_simplify3(
+  %conv1 = fpext float %f to double
+  %neg = fsub double -0.000000e+00, %conv1
+  %cos = call double @cos(double %neg)
+; NO-FLOAT-SHRINK: call double @cos(double %conv1)
+  %conv2 = fptrunc double %cos to float
+  ret float %conv2
+}