| Chris Lattner | 71d845c | 2010-02-09 06:24:00 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=x86 | FileCheck %s -check-prefix=X32 |
| 2 | ; RUN: llc < %s -march=x86-64 | FileCheck %s -check-prefix=X64 |
| 3 | |
| 4 | ; The immediate can be encoded in a smaller way if the |
| 5 | ; instruction is a sub instead of an add. |
| 6 | |
| 7 | define i32 @test1(i32 inreg %a) nounwind { |
| 8 | %b = add i32 %a, 128 |
| 9 | ret i32 %b |
| 10 | ; X32: subl $-128, %eax |
| 11 | ; X64: subl $-128, |
| 12 | } |
| 13 | define i64 @test2(i64 inreg %a) nounwind { |
| 14 | %b = add i64 %a, 2147483648 |
| 15 | ret i64 %b |
| 16 | ; X32: addl $-2147483648, %eax |
| 17 | ; X64: subq $-2147483648, |
| 18 | } |
| 19 | define i64 @test3(i64 inreg %a) nounwind { |
| 20 | %b = add i64 %a, 128 |
| 21 | ret i64 %b |
| 22 | |
| 23 | ; X32: addl $128, %eax |
| 24 | ; X64: subq $-128, |
| 25 | } |
| Chris Lattner | 7816239 | 2010-02-09 06:33:27 +0000 | [diff] [blame] | 26 | |
| 27 | define i1 @test4(i32 %v1, i32 %v2, i32* %X) nounwind { |
| 28 | entry: |
| 29 | %t = call {i32, i1} @llvm.sadd.with.overflow.i32(i32 %v1, i32 %v2) |
| 30 | %sum = extractvalue {i32, i1} %t, 0 |
| 31 | %obit = extractvalue {i32, i1} %t, 1 |
| 32 | br i1 %obit, label %overflow, label %normal |
| 33 | |
| 34 | normal: |
| 35 | store i32 0, i32* %X |
| 36 | br label %overflow |
| 37 | |
| 38 | overflow: |
| 39 | ret i1 false |
| 40 | |
| 41 | ; X32: test4: |
| 42 | ; X32: addl |
| 43 | ; X32-NEXT: jo |
| 44 | |
| 45 | ; X64: test4: |
| 46 | ; X64: addl %esi, %edi |
| 47 | ; X64-NEXT: jo |
| 48 | } |
| 49 | |
| 50 | define i1 @test5(i32 %v1, i32 %v2, i32* %X) nounwind { |
| 51 | entry: |
| 52 | %t = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %v1, i32 %v2) |
| 53 | %sum = extractvalue {i32, i1} %t, 0 |
| 54 | %obit = extractvalue {i32, i1} %t, 1 |
| 55 | br i1 %obit, label %carry, label %normal |
| 56 | |
| 57 | normal: |
| 58 | store i32 0, i32* %X |
| 59 | br label %carry |
| 60 | |
| 61 | carry: |
| 62 | ret i1 false |
| 63 | |
| 64 | ; X32: test5: |
| 65 | ; X32: addl |
| 66 | ; X32-NEXT: jb |
| 67 | |
| 68 | ; X64: test5: |
| 69 | ; X64: addl %esi, %edi |
| 70 | ; X64-NEXT: jb |
| 71 | } |
| 72 | |
| 73 | declare {i32, i1} @llvm.sadd.with.overflow.i32(i32, i32) |
| 74 | declare {i32, i1} @llvm.uadd.with.overflow.i32(i32, i32) |
| Chris Lattner | b00cd1c | 2010-02-09 06:35:50 +0000 | [diff] [blame] | 75 | |
| 76 | |
| 77 | define i64 @test6(i64 %A, i32 %B) nounwind { |
| 78 | %tmp12 = zext i32 %B to i64 ; <i64> [#uses=1] |
| 79 | %tmp3 = shl i64 %tmp12, 32 ; <i64> [#uses=1] |
| 80 | %tmp5 = add i64 %tmp3, %A ; <i64> [#uses=1] |
| 81 | ret i64 %tmp5 |
| 82 | |
| 83 | ; X32: test6: |
| 84 | ; X32: movl 12(%esp), %edx |
| 85 | ; X32-NEXT: addl 8(%esp), %edx |
| 86 | ; X32-NEXT: movl 4(%esp), %eax |
| 87 | ; X32-NEXT: ret |
| 88 | |
| 89 | ; X64: test6: |
| 90 | ; X64: shlq $32, %rsi |
| 91 | ; X64: leaq (%rsi,%rdi), %rax |
| 92 | ; X64: ret |
| 93 | } |
| 94 | |
| Chris Lattner | 39ffcb7 | 2010-12-20 01:16:03 +0000 | [diff] [blame^] | 95 | define {i32, i1} @test7(i32 %v1, i32 %v2) nounwind { |
| 96 | %t = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %v1, i32 %v2) |
| 97 | ret {i32, i1} %t |
| 98 | } |
| 99 | |
| 100 | ; X64: test7: |
| 101 | ; X64: addl %esi, %eax |
| 102 | ; X64-NEXT: setb %dl |
| 103 | ; X64-NEXT: ret |