diff options
Diffstat (limited to 'test/Transforms/DeadStoreElimination/PartialStore.ll')
-rw-r--r-- | test/Transforms/DeadStoreElimination/PartialStore.ll | 71 |
1 files changed, 64 insertions, 7 deletions
diff --git a/test/Transforms/DeadStoreElimination/PartialStore.ll b/test/Transforms/DeadStoreElimination/PartialStore.ll index ab1edf5b4731b..7ac1e0844ed42 100644 --- a/test/Transforms/DeadStoreElimination/PartialStore.ll +++ b/test/Transforms/DeadStoreElimination/PartialStore.ll @@ -1,14 +1,71 @@ -; RUN: opt < %s -dse -S | \ -; RUN: not grep {store i8} +; RUN: opt < %s -basicaa -dse -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" + ; Ensure that the dead store is deleted in this case. It is wholely ; overwritten by the second store. -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" -define i32 @test() { - %V = alloca i32 ; <i32*> [#uses=3] +define void @test1(i32 *%V) { %V2 = bitcast i32* %V to i8* ; <i8*> [#uses=1] store i8 0, i8* %V2 store i32 1234567, i32* %V - %X = load i32* %V ; <i32> [#uses=1] - ret i32 %X + ret void +; CHECK: @test1 +; CHECK-NEXT: store i32 1234567 +} + +; Note that we could do better by merging the two stores into one. +define void @test2(i32* %P) { +; CHECK: @test2 + store i32 0, i32* %P +; CHECK: store i32 + %Q = bitcast i32* %P to i16* + store i16 1, i16* %Q +; CHECK: store i16 + ret void +} + + +define i32 @test3(double %__x) { +; CHECK: @test3 +; CHECK: store double + %__u = alloca { [3 x i32] } + %tmp.1 = bitcast { [3 x i32] }* %__u to double* + store double %__x, double* %tmp.1 + %tmp.4 = getelementptr { [3 x i32] }* %__u, i32 0, i32 0, i32 1 + %tmp.5 = load i32* %tmp.4 + %tmp.6 = icmp slt i32 %tmp.5, 0 + %tmp.7 = zext i1 %tmp.6 to i32 + ret i32 %tmp.7 +} + +; PR6043 +define void @test4(i8* %P) { +; CHECK: @test4 +; CHECK-NEXT: bitcast +; CHECK-NEXT: store double + + store i8 19, i8* %P ;; dead + %A = getelementptr i8* %P, i32 3 + + store i8 42, i8* %A ;; dead + + %Q = bitcast i8* %P to double* + store double 0.0, double* %Q + ret void } +; PR8657 +declare void @test5a(i32*) +define void @test5(i32 %i) nounwind ssp { + %A = alloca i32 + %B = bitcast i32* %A to i8* + %C = getelementptr i8* %B, i32 %i + store i8 10, i8* %C ;; Dead store to variable index. + store i32 20, i32* %A + + call void @test5a(i32* %A) + ret void +; CHECK: @test5( +; CHECK-NEXT: alloca +; CHECK-NEXT: store i32 20 +; CHECK-NEXT: call void @test5a +} |