88 lines
2.3 KiB
LLVM
88 lines
2.3 KiB
LLVM
; 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.
|
|
define void @test1(i32 *%V) {
|
|
%V2 = bitcast i32* %V to i8* ; <i8*> [#uses=1]
|
|
store i8 0, i8* %V2
|
|
store i32 1234567, i32* %V
|
|
ret void
|
|
; CHECK-LABEL: @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-LABEL: @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-LABEL: @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] }, { [3 x i32] }* %__u, i32 0, i32 0, i32 1
|
|
%tmp.5 = load i32, 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-LABEL: @test4(
|
|
; CHECK-NEXT: bitcast
|
|
; CHECK-NEXT: store double
|
|
|
|
store i8 19, i8* %P ;; dead
|
|
%A = getelementptr i8, 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, 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-LABEL: @test5(
|
|
; CHECK-NEXT: alloca
|
|
; CHECK-NEXT: store i32 20
|
|
; CHECK-NEXT: call void @test5a
|
|
}
|
|
|
|
declare void @test5a_as1(i32*)
|
|
define void @test5_addrspacecast(i32 %i) nounwind ssp {
|
|
%A = alloca i32
|
|
%B = addrspacecast i32* %A to i8 addrspace(1)*
|
|
%C = getelementptr i8, i8 addrspace(1)* %B, i32 %i
|
|
store i8 10, i8 addrspace(1)* %C ;; Dead store to variable index.
|
|
store i32 20, i32* %A
|
|
|
|
call void @test5a(i32* %A)
|
|
ret void
|
|
; CHECK-LABEL: @test5_addrspacecast(
|
|
; CHECK-NEXT: alloca
|
|
; CHECK-NEXT: store i32 20
|
|
; CHECK-NEXT: call void @test5a
|
|
}
|