| Alp Toker | cb40291 | 2014-01-24 17:20:08 +0000 | [diff] [blame] | 1 | ; Test that compares are omitted if CC already has the right value |
| Richard Sandiford | fd7f4ae | 2013-08-01 10:39:40 +0000 | [diff] [blame] | 2 | ; (z196 version). |
| 3 | ; |
| 4 | ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s |
| 5 | |
| 6 | ; Addition provides enough for equality comparisons with zero. First teest |
| 7 | ; the EQ case with LOC. |
| 8 | define i32 @f1(i32 %a, i32 %b, i32 *%cptr) { |
| 9 | ; CHECK-LABEL: f1: |
| 10 | ; CHECK: afi %r2, 1000000 |
| 11 | ; CHECK-NEXT: loce %r3, 0(%r4) |
| 12 | ; CHECK: br %r14 |
| 13 | %add = add i32 %a, 1000000 |
| 14 | %cmp = icmp eq i32 %add, 0 |
| 15 | %c = load i32 *%cptr |
| 16 | %arg = select i1 %cmp, i32 %c, i32 %b |
| 17 | call void asm sideeffect "blah $0", "{r3}"(i32 %arg) |
| 18 | ret i32 %add |
| 19 | } |
| 20 | |
| 21 | ; ...and again with STOC. |
| 22 | define i32 @f2(i32 %a, i32 %b, i32 *%cptr) { |
| 23 | ; CHECK-LABEL: f2: |
| 24 | ; CHECK: afi %r2, 1000000 |
| 25 | ; CHECK-NEXT: stoce %r3, 0(%r4) |
| 26 | ; CHECK: br %r14 |
| 27 | %add = add i32 %a, 1000000 |
| 28 | %cmp = icmp eq i32 %add, 0 |
| 29 | %c = load i32 *%cptr |
| 30 | %newval = select i1 %cmp, i32 %b, i32 %c |
| 31 | store i32 %newval, i32 *%cptr |
| 32 | ret i32 %add |
| 33 | } |
| 34 | |
| 35 | ; Reverse the select order and test with LOCR. |
| 36 | define i32 @f3(i32 %a, i32 %b, i32 %c) { |
| 37 | ; CHECK-LABEL: f3: |
| 38 | ; CHECK: afi %r2, 1000000 |
| 39 | ; CHECK-NEXT: locrne %r3, %r4 |
| 40 | ; CHECK: br %r14 |
| 41 | %add = add i32 %a, 1000000 |
| 42 | %cmp = icmp eq i32 %add, 0 |
| 43 | %arg = select i1 %cmp, i32 %b, i32 %c |
| 44 | call void asm sideeffect "blah $0", "{r3}"(i32 %arg) |
| 45 | ret i32 %add |
| 46 | } |
| 47 | |
| 48 | ; ...and again with LOC. |
| 49 | define i32 @f4(i32 %a, i32 %b, i32 *%cptr) { |
| 50 | ; CHECK-LABEL: f4: |
| 51 | ; CHECK: afi %r2, 1000000 |
| 52 | ; CHECK-NEXT: locne %r3, 0(%r4) |
| 53 | ; CHECK: br %r14 |
| 54 | %add = add i32 %a, 1000000 |
| 55 | %cmp = icmp eq i32 %add, 0 |
| 56 | %c = load i32 *%cptr |
| 57 | %arg = select i1 %cmp, i32 %b, i32 %c |
| 58 | call void asm sideeffect "blah $0", "{r3}"(i32 %arg) |
| 59 | ret i32 %add |
| 60 | } |
| 61 | |
| 62 | ; ...and again with STOC. |
| 63 | define i32 @f5(i32 %a, i32 %b, i32 *%cptr) { |
| 64 | ; CHECK-LABEL: f5: |
| 65 | ; CHECK: afi %r2, 1000000 |
| 66 | ; CHECK-NEXT: stocne %r3, 0(%r4) |
| 67 | ; CHECK: br %r14 |
| 68 | %add = add i32 %a, 1000000 |
| 69 | %cmp = icmp eq i32 %add, 0 |
| 70 | %c = load i32 *%cptr |
| 71 | %newval = select i1 %cmp, i32 %c, i32 %b |
| 72 | store i32 %newval, i32 *%cptr |
| 73 | ret i32 %add |
| 74 | } |
| 75 | |
| 76 | ; Change the EQ in f3 to NE. |
| 77 | define i32 @f6(i32 %a, i32 %b, i32 %c) { |
| 78 | ; CHECK-LABEL: f6: |
| 79 | ; CHECK: afi %r2, 1000000 |
| 80 | ; CHECK-NEXT: locre %r3, %r4 |
| 81 | ; CHECK: br %r14 |
| 82 | %add = add i32 %a, 1000000 |
| 83 | %cmp = icmp ne i32 %add, 0 |
| 84 | %arg = select i1 %cmp, i32 %b, i32 %c |
| 85 | call void asm sideeffect "blah $0", "{r3}"(i32 %arg) |
| 86 | ret i32 %add |
| 87 | } |
| 88 | |
| 89 | ; ...and again with LOC. |
| 90 | define i32 @f7(i32 %a, i32 %b, i32 *%cptr) { |
| 91 | ; CHECK-LABEL: f7: |
| 92 | ; CHECK: afi %r2, 1000000 |
| 93 | ; CHECK-NEXT: loce %r3, 0(%r4) |
| 94 | ; CHECK: br %r14 |
| 95 | %add = add i32 %a, 1000000 |
| 96 | %cmp = icmp ne i32 %add, 0 |
| 97 | %c = load i32 *%cptr |
| 98 | %arg = select i1 %cmp, i32 %b, i32 %c |
| 99 | call void asm sideeffect "blah $0", "{r3}"(i32 %arg) |
| 100 | ret i32 %add |
| 101 | } |
| 102 | |
| 103 | ; ...and again with STOC. |
| 104 | define i32 @f8(i32 %a, i32 %b, i32 *%cptr) { |
| 105 | ; CHECK-LABEL: f8: |
| 106 | ; CHECK: afi %r2, 1000000 |
| 107 | ; CHECK-NEXT: stoce %r3, 0(%r4) |
| 108 | ; CHECK: br %r14 |
| 109 | %add = add i32 %a, 1000000 |
| 110 | %cmp = icmp ne i32 %add, 0 |
| 111 | %c = load i32 *%cptr |
| 112 | %newval = select i1 %cmp, i32 %c, i32 %b |
| 113 | store i32 %newval, i32 *%cptr |
| 114 | ret i32 %add |
| 115 | } |