1 files changed, 71 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstSimplify/log2-intrinsic.ll b/llvm/test/Transforms/InstSimplify/log2-intrinsic.ll
new file mode 100644
index 00000000000..dab0cdf9797
--- /dev/null
+++ b/llvm/test/Transforms/InstSimplify/log2-intrinsic.ll
@@ -0,0 +1,71 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instsimplify -S | FileCheck %s
+
+declare double @llvm.log2.f64(double)
+declare double @llvm.exp2.f64(double)
+
+define double @log2_exp2(double %a) {
+; CHECK-LABEL: @log2_exp2(
+; CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.exp2.f64(double [[A:%.*]])
+; CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.log2.f64(double [[TMP1]])
+; CHECK-NEXT:    ret double [[TMP2]]
+;
+  %1 = call double @llvm.exp2.f64(double %a)
+  %2 = call double @llvm.log2.f64(double %1)
+  ret double %2
+}
+
+define double @log2_exp2_fast(double %a) {
+; CHECK-LABEL: @log2_exp2_fast(
+; CHECK-NEXT:    ret double [[A:%.*]]
+;
+  %1 = call fast double @llvm.exp2.f64(double %a)
+  %2 = call fast double @llvm.log2.f64(double %1)
+  ret double %2
+}
+
+define double @log2_fast_exp2_strict(double %a) {
+; CHECK-LABEL: @log2_fast_exp2_strict(
+; CHECK-NEXT:    ret double [[A:%.*]]
+;
+  %1 = call double @llvm.exp2.f64(double %a)
+  %2 = call fast double @llvm.log2.f64(double %1)
+  ret double %2
+}
+
+define double @log2_strict_exp2_fast(double %a) {
+; CHECK-LABEL: @log2_strict_exp2_fast(
+; CHECK-NEXT:    [[TMP1:%.*]] = call fast double @llvm.exp2.f64(double [[A:%.*]])
+; CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.log2.f64(double [[TMP1]])
+; CHECK-NEXT:    ret double [[TMP2]]
+;
+  %1 = call fast double @llvm.exp2.f64(double %a)
+  %2 = call double @llvm.log2.f64(double %1)
+  ret double %2
+}
+
+define double @log2_exp2_log2_exp2(double %a) {
+; CHECK-LABEL: @log2_exp2_log2_exp2(
+; CHECK-NEXT:    [[TMP1:%.*]] = call double @llvm.exp2.f64(double [[A:%.*]])
+; CHECK-NEXT:    [[TMP2:%.*]] = call double @llvm.log2.f64(double [[TMP1]])
+; CHECK-NEXT:    [[TMP3:%.*]] = call double @llvm.exp2.f64(double [[TMP2]])
+; CHECK-NEXT:    [[TMP4:%.*]] = call double @llvm.log2.f64(double [[TMP3]])
+; CHECK-NEXT:    ret double [[TMP4]]
+;
+  %1 = call double @llvm.exp2.f64(double %a)
+  %2 = call double @llvm.log2.f64(double %1)
+  %3 = call double @llvm.exp2.f64(double %2)
+  %4 = call double @llvm.log2.f64(double %3)
+  ret double %4
+}
+
+define double @log2_exp2_log2_exp2_fast(double %a) {
+; CHECK-LABEL: @log2_exp2_log2_exp2_fast(
+; CHECK-NEXT:    ret double [[A:%.*]]
+;
+  %1 = call fast double @llvm.exp2.f64(double %a)
+  %2 = call fast double @llvm.log2.f64(double %1)
+  %3 = call fast double @llvm.exp2.f64(double %2)
+  %4 = call fast double @llvm.log2.f64(double %3)
+  ret double %4
+}