diff --git a/polly/test/Simplify/notdead_region_exitphi.ll b/polly/test/Simplify/notdead_region_exitphi.ll new file mode 100644 index 000000000000..77c34ed8f8eb --- /dev/null +++ b/polly/test/Simplify/notdead_region_exitphi.ll @@ -0,0 +1,44 @@ +; RUN: opt %loadPolly -polly-simplify -analyze < %s | FileCheck %s -match-full-lines +; +; Do not remove dependencies of a phi node in a region's exit block. +; +define void @func(i32 %n, double* noalias nonnull %A, double %alpha) { +entry: + br label %for + +for: + %j = phi i32 [0, %entry], [%j.inc, %inc] + %j.cmp = icmp slt i32 %j, %n + br i1 %j.cmp, label %body, label %exit + + body: + %val = fadd double 21.0, 21.0 + br label %region_entry + + + region_entry: + %region.cmp = fcmp ueq double %alpha, 0.0 + br i1 %region.cmp, label %region_true, label %region_exit + + region_true: + br label %region_exit + + region_exit: + %phi = phi double [%val, %region_true], [0.0, %region_entry] + store double %phi, double* %A + br label %inc + + +inc: + %j.inc = add nuw nsw i32 %j, 1 + br label %for + +exit: + br label %return + +return: + ret void +} + + +; CHECK: SCoP could not be simplified