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Diffstat (limited to 'test/Transforms/InstCombine/no-negzero.ll')
-rw-r--r-- | test/Transforms/InstCombine/no-negzero.ll | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/no-negzero.ll b/test/Transforms/InstCombine/no-negzero.ll new file mode 100644 index 0000000..f295130 --- /dev/null +++ b/test/Transforms/InstCombine/no-negzero.ll @@ -0,0 +1,33 @@ +; 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: @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* %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* %0, align 8 ; <double> [#uses=1] + store double %5, double* %retval, align 8 + br label %return + +return: ; preds = %entry + %retval1 = load double* %retval ; <double> [#uses=1] + ret double %retval1 +} + +declare double @fabs(double) + +declare double @sqrt(double) nounwind readonly |