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Diffstat (limited to 'test/Analysis/BasicAA/phi-speculation.ll')
| -rw-r--r-- | test/Analysis/BasicAA/phi-speculation.ll | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/Analysis/BasicAA/phi-speculation.ll b/test/Analysis/BasicAA/phi-speculation.ll new file mode 100644 index 0000000..21c6592 --- /dev/null +++ b/test/Analysis/BasicAA/phi-speculation.ll @@ -0,0 +1,33 @@ +target datalayout = +"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" + +; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s + +; ptr_phi and ptr2_phi do not alias. +; CHECK: NoAlias: i32* %ptr2_phi, i32* %ptr_phi + +define i32 @test_noalias(i32* %ptr2, i32 %count, i32* %coeff) { +entry: + %ptr = getelementptr inbounds i32* %ptr2, i64 1 + br label %while.body + +while.body: + %num = phi i32 [ %count, %entry ], [ %dec, %while.body ] + %ptr_phi = phi i32* [ %ptr, %entry ], [ %ptr_inc, %while.body ] + %ptr2_phi = phi i32* [ %ptr2, %entry ], [ %ptr2_inc, %while.body ] + %result.09 = phi i32 [ 0 , %entry ], [ %add, %while.body ] + %dec = add nsw i32 %num, -1 + %0 = load i32* %ptr_phi, align 4 + store i32 %0, i32* %ptr2_phi, align 4 + %1 = load i32* %coeff, align 4 + %2 = load i32* %ptr_phi, align 4 + %mul = mul nsw i32 %1, %2 + %add = add nsw i32 %mul, %result.09 + %tobool = icmp eq i32 %dec, 0 + %ptr_inc = getelementptr inbounds i32* %ptr_phi, i64 1 + %ptr2_inc = getelementptr inbounds i32* %ptr2_phi, i64 1 + br i1 %tobool, label %the_exit, label %while.body + +the_exit: + ret i32 %add +} |
