| ; RUN: llc -o - -mtriple=i386-unknown-linux-gnu < %s | FileCheck %s |
| ; RUN: llc -o - -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s |
| |
| @a = common global i32 0, align 4 |
| @b = common global i32 0, align 4 |
| @c = common global i32 0, align 4 |
| @e = common global i32 0, align 4 |
| @x = common global i32 0, align 4 |
| @f = common global i32 0, align 4 |
| @h = common global i32 0, align 4 |
| @i = common global i32 0, align 4 |
| |
| ; Test -Os to make sure immediates with multiple users don't get pulled in to |
| ; instructions. |
| define i32 @foo() optsize { |
| ; CHECK-LABEL: foo: |
| ; CHECK: movl $1234, [[R1:%[a-z]+]] |
| ; CHECK-NOT: movl $1234, a |
| ; CHECK-NOT: movl $1234, b |
| ; CHECK-NOT: movl $12, c |
| ; CHECK-NOT: cmpl $12, e |
| ; CHECK: movl [[R1]], a |
| ; CHECK: movl [[R1]], b |
| |
| entry: |
| store i32 1234, i32* @a |
| store i32 1234, i32* @b |
| store i32 12, i32* @c |
| %0 = load i32, i32* @e |
| %cmp = icmp eq i32 %0, 12 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| store i32 1, i32* @x |
| br label %if.end |
| |
| ; New block.. Make sure 1234 isn't live across basic blocks from before. |
| ; CHECK: movl $1234, f |
| ; CHECK: movl $555, [[R3:%[a-z]+]] |
| ; CHECK-NOT: movl $555, h |
| ; CHECK-NOT: addl $555, i |
| ; CHECK: movl [[R3]], h |
| ; CHECK: addl [[R3]], i |
| |
| if.end: ; preds = %if.then, %entry |
| store i32 1234, i32* @f |
| store i32 555, i32* @h |
| %1 = load i32, i32* @i |
| %add1 = add nsw i32 %1, 555 |
| store i32 %add1, i32* @i |
| ret i32 0 |
| } |
| |
| ; Test -O2 to make sure that all immediates get pulled in to their users. |
| define i32 @foo2() { |
| ; CHECK-LABEL: foo2: |
| ; CHECK: movl $1234, a |
| ; CHECK: movl $1234, b |
| |
| entry: |
| store i32 1234, i32* @a |
| store i32 1234, i32* @b |
| |
| ret i32 0 |
| } |
| |
| declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) #1 |
| |
| @AA = common global [100 x i8] zeroinitializer, align 1 |
| |
| ; memset gets lowered in DAG. Constant merging should hoist all the |
| ; immediates used to store to the individual memory locations. Make |
| ; sure we don't directly store the immediates. |
| define void @foomemset() optsize { |
| ; CHECK-LABEL: foomemset: |
| ; CHECK-NOT: movl ${{.*}}, AA |
| ; CHECK: mov{{l|q}} %{{e|r}}ax, AA |
| |
| entry: |
| call void @llvm.memset.p0i8.i32(i8* getelementptr inbounds ([100 x i8], [100 x i8]* @AA, i32 0, i32 0), i8 33, i32 24, i32 1, i1 false) |
| ret void |
| } |