-; RUN: opt < %s -licm -S | FileCheck %s
-@X = global i32 7 ; <i32*> [#uses=4]
+; RUN: opt < %s -basicaa -tbaa -licm -S | FileCheck %s
+target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
+
+@X = global i32 7 ; <i32*> [#uses=4]
define void @test1(i32 %i) {
Entry:
- br label %Loop
+ br label %Loop
; CHECK: @test1
; CHECK: Entry:
; CHECK-NEXT: load i32* @X
; CHECK-NEXT: br label %Loop
-Loop: ; preds = %Loop, %0
- %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
- %x = load i32* @X ; <i32> [#uses=1]
- %x2 = add i32 %x, 1 ; <i32> [#uses=1]
- store i32 %x2, i32* @X
- %Next = add i32 %j, 1 ; <i32> [#uses=2]
- %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
- br i1 %cond, label %Out, label %Loop
+Loop: ; preds = %Loop, %0
+ %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
+ %x = load i32* @X ; <i32> [#uses=1]
+ %x2 = add i32 %x, 1 ; <i32> [#uses=1]
+ store i32 %x2, i32* @X
+ %Next = add i32 %j, 1 ; <i32> [#uses=2]
+ %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
+ br i1 %cond, label %Out, label %Loop
-Out:
- ret void
+Out:
+ ret void
; CHECK: Out:
; CHECK-NEXT: store i32 %x2, i32* @X
; CHECK-NEXT: ret void
define void @test2(i32 %i) {
Entry:
- br label %Loop
+ br label %Loop
; CHECK: @test2
; CHECK: Entry:
-; CHECK-NEXT: %X1 = getelementptr i32* @X, i64 0
-; CHECK-NEXT: %X2 = getelementptr i32* @X, i64 0
-; CHECK-NEXT: %X1.promoted = load i32* %X1
+; CHECK-NEXT: %.promoted = load i32* getelementptr inbounds (i32* @X, i64 1)
; CHECK-NEXT: br label %Loop
-Loop: ; preds = %Loop, %0
- %X1 = getelementptr i32* @X, i64 0 ; <i32*> [#uses=1]
- %A = load i32* %X1 ; <i32> [#uses=1]
- %V = add i32 %A, 1 ; <i32> [#uses=1]
- %X2 = getelementptr i32* @X, i64 0 ; <i32*> [#uses=1]
- store i32 %V, i32* %X2
- br i1 false, label %Loop, label %Exit
+Loop: ; preds = %Loop, %0
+ %X1 = getelementptr i32* @X, i64 1 ; <i32*> [#uses=1]
+ %A = load i32* %X1 ; <i32> [#uses=1]
+ %V = add i32 %A, 1 ; <i32> [#uses=1]
+ %X2 = getelementptr i32* @X, i64 1 ; <i32*> [#uses=1]
+ store i32 %V, i32* %X2
+ br i1 false, label %Loop, label %Exit
-Exit: ; preds = %Loop
- ret void
+Exit: ; preds = %Loop
+ ret void
; CHECK: Exit:
-; CHECK-NEXT: store i32 %V, i32* %X1
+; CHECK-NEXT: store i32 %V, i32* getelementptr inbounds (i32* @X, i64 1)
; CHECK-NEXT: ret void
}
define void @test3(i32 %i) {
; CHECK: @test3
- br label %Loop
+ br label %Loop
Loop:
; Should not promote this to a register
- %x = volatile load i32* @X
- %x2 = add i32 %x, 1
- store i32 %x2, i32* @X
- br i1 true, label %Out, label %Loop
-
+ %x = load volatile i32* @X
+ %x2 = add i32 %x, 1
+ store i32 %x2, i32* @X
+ br i1 true, label %Out, label %Loop
+
; CHECK: Loop:
-; CHECK-NEXT: volatile load
+; CHECK-NEXT: load volatile
+
+Out: ; preds = %Loop
+ ret void
+}
+
+; PR8041
+define void @test4(i8* %x, i8 %n) {
+; CHECK: @test4
+ %handle1 = alloca i8*
+ %handle2 = alloca i8*
+ store i8* %x, i8** %handle1
+ br label %loop
+
+loop:
+ %tmp = getelementptr i8* %x, i64 8
+ store i8* %tmp, i8** %handle2
+ br label %subloop
+
+subloop:
+ %count = phi i8 [ 0, %loop ], [ %nextcount, %subloop ]
+ %offsetx2 = load i8** %handle2
+ store i8 %n, i8* %offsetx2
+ %newoffsetx2 = getelementptr i8* %offsetx2, i64 -1
+ store i8* %newoffsetx2, i8** %handle2
+ %nextcount = add i8 %count, 1
+ %innerexitcond = icmp sge i8 %nextcount, 8
+ br i1 %innerexitcond, label %innerexit, label %subloop
+
+; Should have promoted 'handle2' accesses.
+; CHECK: subloop:
+; CHECK-NEXT: phi i8* [
+; CHECK-NEXT: %count = phi i8 [
+; CHECK-NEXT: store i8 %n
+; CHECK-NOT: store
+; CHECK: br i1
+
+innerexit:
+ %offsetx1 = load i8** %handle1
+ %val = load i8* %offsetx1
+ %cond = icmp eq i8 %val, %n
+ br i1 %cond, label %exit, label %loop
+
+; Should not have promoted offsetx1 loads.
+; CHECK: innerexit:
+; CHECK: %val = load i8* %offsetx1
+; CHECK: %cond = icmp eq i8 %val, %n
+; CHECK: br i1 %cond, label %exit, label %loop
+
+exit:
+ ret void
+}
+
+define void @test5(i32 %i, i32** noalias %P2) {
+Entry:
+ br label %Loop
+; CHECK: @test5
+; CHECK: Entry:
+; CHECK-NEXT: load i32* @X
+; CHECK-NEXT: br label %Loop
+
+
+Loop: ; preds = %Loop, %0
+ %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
+ %x = load i32* @X ; <i32> [#uses=1]
+ %x2 = add i32 %x, 1 ; <i32> [#uses=1]
+ store i32 %x2, i32* @X
+
+ store volatile i32* @X, i32** %P2
+
+ %Next = add i32 %j, 1 ; <i32> [#uses=2]
+ %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
+ br i1 %cond, label %Out, label %Loop
+
+Out:
+ ret void
+; CHECK: Out:
+; CHECK-NEXT: store i32 %x2, i32* @X
+; CHECK-NEXT: ret void
+
+}
+
+
+; PR14753 - Preserve TBAA tags when promoting values in a loop.
+define void @test6(i32 %n, float* nocapture %a, i32* %gi) {
+entry:
+ store i32 0, i32* %gi, align 4, !tbaa !0
+ %cmp1 = icmp slt i32 0, %n
+ br i1 %cmp1, label %for.body.lr.ph, label %for.end
+
+for.body.lr.ph: ; preds = %entry
+ br label %for.body
+
+for.body: ; preds = %for.body.lr.ph, %for.body
+ %storemerge2 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
+ %idxprom = sext i32 %storemerge2 to i64
+ %arrayidx = getelementptr inbounds float* %a, i64 %idxprom
+ store float 0.000000e+00, float* %arrayidx, align 4, !tbaa !3
+ %0 = load i32* %gi, align 4, !tbaa !0
+ %inc = add nsw i32 %0, 1
+ store i32 %inc, i32* %gi, align 4, !tbaa !0
+ %cmp = icmp slt i32 %inc, %n
+ br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
+
+for.cond.for.end_crit_edge: ; preds = %for.body
+ br label %for.end
+
+for.end: ; preds = %for.cond.for.end_crit_edge, %entry
+ ret void
-Out: ; preds = %Loop
- ret void
+; CHECK: for.body.lr.ph:
+; CHECK-NEXT: %gi.promoted = load i32* %gi, align 4, !tbaa !0
+; CHECK: for.cond.for.end_crit_edge:
+; CHECK-NEXT: store i32 %inc, i32* %gi, align 4, !tbaa !0
}
+!0 = metadata !{metadata !"int", metadata !1}
+!1 = metadata !{metadata !"omnipotent char", metadata !2}
+!2 = metadata !{metadata !"Simple C/C++ TBAA"}
+!3 = metadata !{metadata !"float", metadata !1}
projects / oota-llvm.git / blobdiff