| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=i386-unknown-linux-gnu | FileCheck %s --check-prefix=X86 |
| ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --check-prefix=X64 |
| |
| @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 { |
| ; X86-LABEL: foo: |
| ; X86: # %bb.0: # %entry |
| ; X86-NEXT: movl $1234, %eax # imm = 0x4D2 |
| ; X86-NEXT: movl %eax, a |
| ; X86-NEXT: movl %eax, b |
| ; X86-NEXT: movl $12, %eax |
| ; X86-NEXT: movl %eax, c |
| ; X86-NEXT: cmpl %eax, e |
| ; X86-NEXT: jne .LBB0_2 |
| ; X86-NEXT: # %bb.1: # %if.then |
| ; X86-NEXT: movl $1, x |
| ; X86-NEXT: .LBB0_2: # %if.end |
| ; X86-NEXT: movl $1234, f # imm = 0x4D2 |
| ; X86-NEXT: movl $555, %eax # imm = 0x22B |
| ; X86-NEXT: movl %eax, h |
| ; X86-NEXT: addl %eax, i |
| ; X86-NEXT: xorl %eax, %eax |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: foo: |
| ; X64: # %bb.0: # %entry |
| ; X64-NEXT: movl $1234, %eax # imm = 0x4D2 |
| ; X64-NEXT: movl %eax, {{.*}}(%rip) |
| ; X64-NEXT: movl %eax, {{.*}}(%rip) |
| ; X64-NEXT: movl $12, %eax |
| ; X64-NEXT: movl %eax, {{.*}}(%rip) |
| ; X64-NEXT: cmpl %eax, {{.*}}(%rip) |
| ; X64-NEXT: jne .LBB0_2 |
| ; X64-NEXT: # %bb.1: # %if.then |
| ; X64-NEXT: movl $1, {{.*}}(%rip) |
| ; X64-NEXT: .LBB0_2: # %if.end |
| ; X64-NEXT: movl $1234, {{.*}}(%rip) # imm = 0x4D2 |
| ; X64-NEXT: movl $555, %eax # imm = 0x22B |
| ; X64-NEXT: movl %eax, {{.*}}(%rip) |
| ; X64-NEXT: addl %eax, {{.*}}(%rip) |
| ; X64-NEXT: xorl %eax, %eax |
| ; X64-NEXT: retq |
| 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. |
| 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() { |
| ; X86-LABEL: foo2: |
| ; X86: # %bb.0: # %entry |
| ; X86-NEXT: movl $1234, a # imm = 0x4D2 |
| ; X86-NEXT: movl $1234, b # imm = 0x4D2 |
| ; X86-NEXT: xorl %eax, %eax |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: foo2: |
| ; X64: # %bb.0: # %entry |
| ; X64-NEXT: movl $1234, {{.*}}(%rip) # imm = 0x4D2 |
| ; X64-NEXT: movl $1234, {{.*}}(%rip) # imm = 0x4D2 |
| ; X64-NEXT: xorl %eax, %eax |
| ; X64-NEXT: retq |
| entry: |
| store i32 1234, i32* @a |
| store i32 1234, i32* @b |
| ret i32 0 |
| } |
| |
| declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, 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 { |
| ; X86-LABEL: foomemset: |
| ; X86: # %bb.0: # %entry |
| ; X86-NEXT: movl $555819297, %eax # imm = 0x21212121 |
| ; X86-NEXT: movl %eax, AA+20 |
| ; X86-NEXT: movl %eax, AA+16 |
| ; X86-NEXT: movl %eax, AA+12 |
| ; X86-NEXT: movl %eax, AA+8 |
| ; X86-NEXT: movl %eax, AA+4 |
| ; X86-NEXT: movl %eax, AA |
| ; X86-NEXT: retl |
| ; |
| ; X64-LABEL: foomemset: |
| ; X64: # %bb.0: # %entry |
| ; X64-NEXT: movabsq $2387225703656530209, %rax # imm = 0x2121212121212121 |
| ; X64-NEXT: movq %rax, AA+{{.*}}(%rip) |
| ; X64-NEXT: movq %rax, AA+{{.*}}(%rip) |
| ; X64-NEXT: movq %rax, {{.*}}(%rip) |
| ; X64-NEXT: retq |
| 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, i1 false) |
| ret void |
| } |