| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| ; ModuleID = '3555a.c' |
| ; sqrt(fabs) cannot be negative zero, so we should eliminate the fadd. |
| target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" |
| target triple = "i386-apple-darwin9.8" |
| |
| ; CHECK-LABEL: @mysqrt( |
| ; CHECK-NOT: fadd |
| ; CHECK: ret |
| define double @mysqrt(double %x) nounwind { |
| entry: |
| %x_addr = alloca double ; <double*> [#uses=2] |
| %retval = alloca double, align 8 ; <double*> [#uses=2] |
| %0 = alloca double, align 8 ; <double*> [#uses=2] |
| %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] |
| store double %x, double* %x_addr |
| %1 = load double, double* %x_addr, align 8 ; <double> [#uses=1] |
| %2 = call double @fabs(double %1) nounwind readnone ; <double> [#uses=1] |
| %3 = call double @sqrt(double %2) nounwind readonly ; <double> [#uses=1] |
| %4 = fadd double %3, 0.000000e+00 ; <double> [#uses=1] |
| store double %4, double* %0, align 8 |
| %5 = load double, double* %0, align 8 ; <double> [#uses=1] |
| store double %5, double* %retval, align 8 |
| br label %return |
| |
| return: ; preds = %entry |
| %retval1 = load double, double* %retval ; <double> [#uses=1] |
| ret double %retval1 |
| } |
| |
| declare double @fabs(double) |
| |
| declare double @sqrt(double) nounwind readonly |
