-; RUN: llvm-upgrade < %s | llvm-as | opt -instcombine | llvm-dis | \
-; RUN: grep -v {store.*,.*null} | not grep store
+; RUN: opt < %s -instcombine -S | FileCheck %s
-void %test1(int* %P) {
- store int undef, int* %P
- store int 123, int* undef
- store int 124, int* null
- ret void
+define void @test1(i32* %P) {
+ store i32 undef, i32* %P
+ store i32 123, i32* undef
+ store i32 124, i32* null
+ ret void
+; CHECK: @test1(
+; CHECK-NEXT: store i32 123, i32* undef
+; CHECK-NEXT: store i32 undef, i32* null
+; CHECK-NEXT: ret void
+}
+
+define void @test2(i32* %P) {
+ %X = load i32* %P ; <i32> [#uses=1]
+ %Y = add i32 %X, 0 ; <i32> [#uses=1]
+ store i32 %Y, i32* %P
+ ret void
+; CHECK: @test2
+; CHECK-NEXT: ret void
+}
+
+;; Simple sinking tests
+
+; "if then else"
+define i32 @test3(i1 %C) {
+ %A = alloca i32
+ br i1 %C, label %Cond, label %Cond2
+
+Cond:
+ store i32 -987654321, i32* %A
+ br label %Cont
+
+Cond2:
+ store i32 47, i32* %A
+ br label %Cont
+
+Cont:
+ %V = load i32* %A
+ ret i32 %V
+; CHECK: @test3
+; CHECK-NOT: alloca
+; CHECK: Cont:
+; CHECK-NEXT: %storemerge = phi i32 [ 47, %Cond2 ], [ -987654321, %Cond ]
+; CHECK-NEXT: ret i32 %storemerge
+}
+
+; "if then"
+define i32 @test4(i1 %C) {
+ %A = alloca i32
+ store i32 47, i32* %A
+ br i1 %C, label %Cond, label %Cont
+
+Cond:
+ store i32 -987654321, i32* %A
+ br label %Cont
+
+Cont:
+ %V = load i32* %A
+ ret i32 %V
+; CHECK: @test4
+; CHECK-NOT: alloca
+; CHECK: Cont:
+; CHECK-NEXT: %storemerge = phi i32 [ -987654321, %Cond ], [ 47, %0 ]
+; CHECK-NEXT: ret i32 %storemerge
}
-void %test2(int* %P) {
- %X = load int* %P
- %Y = add int %X, 0
- store int %Y, int* %P
+; "if then"
+define void @test5(i1 %C, i32* %P) {
+ store i32 47, i32* %P, align 1
+ br i1 %C, label %Cond, label %Cont
+
+Cond:
+ store i32 -987654321, i32* %P, align 1
+ br label %Cont
+
+Cont:
ret void
+; CHECK: @test5
+; CHECK: Cont:
+; CHECK-NEXT: %storemerge = phi i32
+; CHECK-NEXT: store i32 %storemerge, i32* %P, align 1
+; CHECK-NEXT: ret void
}
+