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Revert "[BasicAA] Revert "Revert r218714 - Make better use of zext and sign information.""

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This reverts commit r219135 -- still causing miscompiles in SPEC it seems...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219432 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2014-10-09 19:48:12 +00:00
parent 2b3bbbdf0c
commit adba582bc6
3 changed files with 2 additions and 129 deletions
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87
test/Analysis/BasicAA/zext.ll
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@@ -1,87 +0,0 @@
; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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"
target triple = "x86_64-unknown-linux-gnu"
; CHECK-LABEL: test_with_zext
; CHECK: NoAlias: i8* %a, i8* %b
define void @test_with_zext() {
%1 = tail call i8* @malloc(i64 120)
%a = getelementptr inbounds i8* %1, i64 8
%2 = getelementptr inbounds i8* %1, i64 16
%3 = zext i32 3 to i64
%b = getelementptr inbounds i8* %2, i64 %3
ret void
}
; CHECK-LABEL: test_with_lshr
; CHECK: NoAlias: i8* %a, i8* %b
define void @test_with_lshr(i64 %i) {
%1 = tail call i8* @malloc(i64 120)
%a = getelementptr inbounds i8* %1, i64 8
%2 = getelementptr inbounds i8* %1, i64 16
%3 = lshr i64 %i, 2
%b = getelementptr inbounds i8* %2, i64 %3
ret void
}
; CHECK-LABEL: test_with_a_loop
; CHECK: NoAlias: i8* %a, i8* %b
define void @test_with_a_loop() {
%1 = tail call i8* @malloc(i64 120)
%a = getelementptr inbounds i8* %1, i64 8
%2 = getelementptr inbounds i8* %1, i64 16
br label %for.loop
for.loop:
%i = phi i32 [ 0, %0 ], [ %i.next, %for.loop ]
%3 = zext i32 %i to i64
%b = getelementptr inbounds i8* %2, i64 %3
%i.next = add nuw nsw i32 %i, 1
%4 = icmp eq i32 %i.next, 10
br i1 %4, label %for.loop.exit, label %for.loop
for.loop.exit:
ret void
}
; CHECK-LABEL: test_sign_extension
; CHECK: PartialAlias: i64* %b.i64, i8* %a
define void @test_sign_extension(i32 %p) {
%1 = tail call i8* @malloc(i64 120)
%p.64 = zext i32 %p to i64
%a = getelementptr inbounds i8* %1, i64 %p.64
%p.minus1 = add i32 %p, -1
%p.minus1.64 = zext i32 %p.minus1 to i64
%b.i8 = getelementptr inbounds i8* %1, i64 %p.minus1.64
%b.i64 = bitcast i8* %b.i8 to i64*
ret void
}
; CHECK-LABEL: test_fe_tools
; CHECK: PartialAlias: i32* %a, i32* %b
define void @test_fe_tools([8 x i32]* %values) {
br label %reorder
for.loop:
%i = phi i32 [ 0, %reorder ], [ %i.next, %for.loop ]
%idxprom = zext i32 %i to i64
%b = getelementptr inbounds [8 x i32]* %values, i64 0, i64 %idxprom
%i.next = add nuw nsw i32 %i, 1
%1 = icmp eq i32 %i.next, 10
br i1 %1, label %for.loop.exit, label %for.loop
reorder:
%a = getelementptr inbounds [8 x i32]* %values, i64 0, i64 1
br label %for.loop
for.loop.exit:
ret void
}
; Function Attrs: nounwind
declare noalias i8* @malloc(i64)