; RUN: opt < %s -instcombine -S | FileCheck %s
-define double @mylog(double %x, double %y) #0 {
-entry:
+define double @log_pow(double %x, double %y) {
+ %pow = call fast double @llvm.pow.f64(double %x, double %y)
+ %call = call fast double @log(double %pow)
+ ret double %call
+}
+
+; CHECK-LABEL: define double @log_pow(
+; CHECK-NEXT: %log = call fast double @log(double %x)
+; CHECK-NEXT: %mul = fmul fast double %log, %y
+; CHECK-NEXT: ret double %mul
+
+define double @log_pow_not_fast(double %x, double %y) {
%pow = call double @llvm.pow.f64(double %x, double %y)
- %call = call double @log(double %pow) #0
+ %call = call fast double @log(double %pow)
ret double %call
}
-; CHECK-LABEL: define double @mylog(
-; CHECK: %log = call double @log(double %x) #0
-; CHECK: %mul = fmul fast double %log, %y
-; CHECK: ret double %mul
-; CHECK: }
+; CHECK-LABEL: define double @log_pow_not_fast(
+; CHECK-NEXT: %pow = call double @llvm.pow.f64(double %x, double %y)
+; CHECK-NEXT: %call = call fast double @log(double %pow)
+; CHECK-NEXT: ret double %call
+
+define double @function_pointer(double ()* %fptr, double %p1) {
+ %call1 = call double %fptr()
+ %pow = call double @log(double %call1)
+ ret double %pow
+}
+
+; CHECK-LABEL: @function_pointer
+; CHECK-NEXT: %call1 = call double %fptr()
+; CHECK-NEXT: %pow = call double @log(double %call1)
+; CHECK-NEXT: ret double %pow
+
+define double @log_exp2(double %x) {
+ %call2 = call fast double @exp2(double %x)
+ %call3 = call fast double @log(double %call2)
+ ret double %call3
+}
+
+; CHECK-LABEL: @log_exp2
+; CHECK-NEXT: %call2 = call fast double @exp2(double %x)
+; CHECK-NEXT: %logmul = fmul fast double %x, 0x3FE62E42FEFA39EF
+; CHECK-NEXT: ret double %logmul
+
+define double @log_exp2_not_fast(double %x) {
+ %call2 = call double @exp2(double %x)
+ %call3 = call fast double @log(double %call2)
+ ret double %call3
+}
+
+; CHECK-LABEL: @log_exp2_not_fast
+; CHECK-NEXT: %call2 = call double @exp2(double %x)
+; CHECK-NEXT: %call3 = call fast double @log(double %call2)
+; CHECK-NEXT: ret double %call3
-declare double @log(double) #0
+declare double @log(double)
+declare double @exp2(double)
declare double @llvm.pow.f64(double, double)
-attributes #0 = { "unsafe-fp-math"="true" }