1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc < %s -mtriple=i386-unknown-linux-gnu | FileCheck %s --check-prefix=X86 3 ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --check-prefix=X64 4 5 @a = common global i32 0, align 4 6 @b = common global i32 0, align 4 7 @c = common global i32 0, align 4 8 @e = common global i32 0, align 4 9 @x = common global i32 0, align 4 10 @f = common global i32 0, align 4 11 @h = common global i32 0, align 4 12 @i = common global i32 0, align 4 13 14 ; Test -Os to make sure immediates with multiple users don't get pulled in to 15 ; instructions. 16 define i32 @foo() optsize { 17 ; X86-LABEL: foo: 18 ; X86: # %bb.0: # %entry 19 ; X86-NEXT: movl $1234, %eax # imm = 0x4D2 20 ; X86-NEXT: movl %eax, a 21 ; X86-NEXT: movl %eax, b 22 ; X86-NEXT: movl $12, %eax 23 ; X86-NEXT: movl %eax, c 24 ; X86-NEXT: cmpl %eax, e 25 ; X86-NEXT: jne .LBB0_2 26 ; X86-NEXT: # %bb.1: # %if.then 27 ; X86-NEXT: movl $1, x 28 ; X86-NEXT: .LBB0_2: # %if.end 29 ; X86-NEXT: movl $1234, f # imm = 0x4D2 30 ; X86-NEXT: movl $555, %eax # imm = 0x22B 31 ; X86-NEXT: movl %eax, h 32 ; X86-NEXT: addl %eax, i 33 ; X86-NEXT: xorl %eax, %eax 34 ; X86-NEXT: retl 35 ; 36 ; X64-LABEL: foo: 37 ; X64: # %bb.0: # %entry 38 ; X64-NEXT: movl $1234, %eax # imm = 0x4D2 39 ; X64-NEXT: movl %eax, {{.*}}(%rip) 40 ; X64-NEXT: movl %eax, {{.*}}(%rip) 41 ; X64-NEXT: movl $12, %eax 42 ; X64-NEXT: movl %eax, {{.*}}(%rip) 43 ; X64-NEXT: cmpl %eax, {{.*}}(%rip) 44 ; X64-NEXT: jne .LBB0_2 45 ; X64-NEXT: # %bb.1: # %if.then 46 ; X64-NEXT: movl $1, {{.*}}(%rip) 47 ; X64-NEXT: .LBB0_2: # %if.end 48 ; X64-NEXT: movl $1234, {{.*}}(%rip) # imm = 0x4D2 49 ; X64-NEXT: movl $555, %eax # imm = 0x22B 50 ; X64-NEXT: movl %eax, {{.*}}(%rip) 51 ; X64-NEXT: addl %eax, {{.*}}(%rip) 52 ; X64-NEXT: xorl %eax, %eax 53 ; X64-NEXT: retq 54 entry: 55 store i32 1234, i32* @a 56 store i32 1234, i32* @b 57 store i32 12, i32* @c 58 %0 = load i32, i32* @e 59 %cmp = icmp eq i32 %0, 12 60 br i1 %cmp, label %if.then, label %if.end 61 62 if.then: ; preds = %entry 63 store i32 1, i32* @x 64 br label %if.end 65 66 ; New block.. Make sure 1234 isn't live across basic blocks from before. 67 if.end: ; preds = %if.then, %entry 68 store i32 1234, i32* @f 69 store i32 555, i32* @h 70 %1 = load i32, i32* @i 71 %add1 = add nsw i32 %1, 555 72 store i32 %add1, i32* @i 73 ret i32 0 74 } 75 76 ; Test -O2 to make sure that all immediates get pulled in to their users. 77 define i32 @foo2() { 78 ; X86-LABEL: foo2: 79 ; X86: # %bb.0: # %entry 80 ; X86-NEXT: movl $1234, a # imm = 0x4D2 81 ; X86-NEXT: movl $1234, b # imm = 0x4D2 82 ; X86-NEXT: xorl %eax, %eax 83 ; X86-NEXT: retl 84 ; 85 ; X64-LABEL: foo2: 86 ; X64: # %bb.0: # %entry 87 ; X64-NEXT: movl $1234, {{.*}}(%rip) # imm = 0x4D2 88 ; X64-NEXT: movl $1234, {{.*}}(%rip) # imm = 0x4D2 89 ; X64-NEXT: xorl %eax, %eax 90 ; X64-NEXT: retq 91 entry: 92 store i32 1234, i32* @a 93 store i32 1234, i32* @b 94 ret i32 0 95 } 96 97 declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i1) #1 98 99 @AA = common global [100 x i8] zeroinitializer, align 1 100 101 ; memset gets lowered in DAG. Constant merging should hoist all the 102 ; immediates used to store to the individual memory locations. Make 103 ; sure we don't directly store the immediates. 104 define void @foomemset() optsize { 105 ; X86-LABEL: foomemset: 106 ; X86: # %bb.0: # %entry 107 ; X86-NEXT: movl $555819297, %eax # imm = 0x21212121 108 ; X86-NEXT: movl %eax, AA+20 109 ; X86-NEXT: movl %eax, AA+16 110 ; X86-NEXT: movl %eax, AA+12 111 ; X86-NEXT: movl %eax, AA+8 112 ; X86-NEXT: movl %eax, AA+4 113 ; X86-NEXT: movl %eax, AA 114 ; X86-NEXT: retl 115 ; 116 ; X64-LABEL: foomemset: 117 ; X64: # %bb.0: # %entry 118 ; X64-NEXT: movabsq $2387225703656530209, %rax # imm = 0x2121212121212121 119 ; X64-NEXT: movq %rax, AA+{{.*}}(%rip) 120 ; X64-NEXT: movq %rax, AA+{{.*}}(%rip) 121 ; X64-NEXT: movq %rax, {{.*}}(%rip) 122 ; X64-NEXT: retq 123 entry: 124 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) 125 ret void 126 } 127
