Jakob Stoklund Olesen | 8e86929 | 2012-05-20 06:38:32 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=x86 -verify-coalescing | FileCheck %s |
Chris Lattner | bd8b13d | 2005-05-09 17:09:31 +0000 | [diff] [blame] | 2 | |
Chandler Carruth | 1e141a8 | 2012-01-05 11:05:47 +0000 | [diff] [blame] | 3 | define i32* @test1(i32* %P, i32 %X) { |
| 4 | ; CHECK: test1: |
| 5 | ; CHECK-NOT: shrl |
| 6 | ; CHECK-NOT: shll |
| 7 | ; CHECK: ret |
| 8 | |
| 9 | entry: |
| 10 | %Y = lshr i32 %X, 2 |
| 11 | %gep.upgrd.1 = zext i32 %Y to i64 |
| 12 | %P2 = getelementptr i32* %P, i64 %gep.upgrd.1 |
| 13 | ret i32* %P2 |
Chris Lattner | bd8b13d | 2005-05-09 17:09:31 +0000 | [diff] [blame] | 14 | } |
| 15 | |
Chandler Carruth | 1e141a8 | 2012-01-05 11:05:47 +0000 | [diff] [blame] | 16 | define i32* @test2(i32* %P, i32 %X) { |
| 17 | ; CHECK: test2: |
| 18 | ; CHECK: shll $4 |
| 19 | ; CHECK-NOT: shll |
| 20 | ; CHECK: ret |
| 21 | |
| 22 | entry: |
| 23 | %Y = shl i32 %X, 2 |
| 24 | %gep.upgrd.2 = zext i32 %Y to i64 |
| 25 | %P2 = getelementptr i32* %P, i64 %gep.upgrd.2 |
| 26 | ret i32* %P2 |
Chris Lattner | bd8b13d | 2005-05-09 17:09:31 +0000 | [diff] [blame] | 27 | } |
| 28 | |
Chandler Carruth | 1e141a8 | 2012-01-05 11:05:47 +0000 | [diff] [blame] | 29 | define i32* @test3(i32* %P, i32 %X) { |
| 30 | ; CHECK: test3: |
| 31 | ; CHECK-NOT: shrl |
| 32 | ; CHECK-NOT: shll |
| 33 | ; CHECK: ret |
| 34 | |
| 35 | entry: |
| 36 | %Y = ashr i32 %X, 2 |
| 37 | %P2 = getelementptr i32* %P, i32 %Y |
| 38 | ret i32* %P2 |
Chris Lattner | bd8b13d | 2005-05-09 17:09:31 +0000 | [diff] [blame] | 39 | } |
Tanya Lattner | 33eefff | 2008-02-21 07:42:26 +0000 | [diff] [blame] | 40 | |
Chandler Carruth | 1e141a8 | 2012-01-05 11:05:47 +0000 | [diff] [blame] | 41 | define fastcc i32 @test4(i32* %d) { |
| 42 | ; CHECK: test4: |
| 43 | ; CHECK-NOT: shrl |
| 44 | ; CHECK: ret |
| 45 | |
| 46 | entry: |
Dan Gohman | 4e39e9d | 2010-06-24 14:30:44 +0000 | [diff] [blame] | 47 | %tmp4 = load i32* %d |
| 48 | %tmp512 = lshr i32 %tmp4, 24 |
| 49 | ret i32 %tmp512 |
| 50 | } |
Chandler Carruth | 62dfc51 | 2012-01-05 11:05:55 +0000 | [diff] [blame] | 51 | |
| 52 | define i64 @test5(i16 %i, i32* %arr) { |
| 53 | ; Ensure that we don't fold away shifts which have multiple uses, as they are |
| 54 | ; just re-introduced for the second use. |
| 55 | ; CHECK: test5: |
| 56 | ; CHECK-NOT: shrl |
| 57 | ; CHECK: shrl $11 |
| 58 | ; CHECK-NOT: shrl |
| 59 | ; CHECK: ret |
| 60 | |
| 61 | entry: |
| 62 | %i.zext = zext i16 %i to i32 |
| 63 | %index = lshr i32 %i.zext, 11 |
| 64 | %index.zext = zext i32 %index to i64 |
| 65 | %val.ptr = getelementptr inbounds i32* %arr, i64 %index.zext |
| 66 | %val = load i32* %val.ptr |
| 67 | %val.zext = zext i32 %val to i64 |
| 68 | %sum = add i64 %val.zext, %index.zext |
| 69 | ret i64 %sum |
| 70 | } |