| Dan Gohman | 0a06310 | 2009-09-08 23:54:48 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=x86 -regalloc=local | grep {subl %eax, %edx} |
| Dan Gohman | ec06ecd | 2008-10-04 00:31:14 +0000 | [diff] [blame] | 2 | |
| 3 | ; Local regalloc shouldn't assume that both the uses of the |
| 4 | ; sub instruction are kills, because one of them is tied |
| 5 | ; to an output. Previously, it was allocating both inputs |
| 6 | ; in the same register. |
| 7 | |
| 8 | define i32 @func_3() nounwind { |
| 9 | entry: |
| 10 | %retval = alloca i32 ; <i32*> [#uses=2] |
| 11 | %g_323 = alloca i8 ; <i8*> [#uses=2] |
| 12 | %p_5 = alloca i64, align 8 ; <i64*> [#uses=2] |
| 13 | %0 = alloca i32 ; <i32*> [#uses=2] |
| 14 | %"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0] |
| 15 | store i64 0, i64* %p_5, align 8 |
| 16 | store i8 1, i8* %g_323, align 1 |
| 17 | %1 = load i8* %g_323, align 1 ; <i8> [#uses=1] |
| 18 | %2 = sext i8 %1 to i64 ; <i64> [#uses=1] |
| 19 | %3 = load i64* %p_5, align 8 ; <i64> [#uses=1] |
| 20 | %4 = sub i64 %3, %2 ; <i64> [#uses=1] |
| 21 | %5 = icmp sge i64 %4, 0 ; <i1> [#uses=1] |
| 22 | %6 = zext i1 %5 to i32 ; <i32> [#uses=1] |
| 23 | store i32 %6, i32* %0, align 4 |
| 24 | %7 = load i32* %0, align 4 ; <i32> [#uses=1] |
| 25 | store i32 %7, i32* %retval, align 4 |
| 26 | br label %return |
| 27 | |
| 28 | return: ; preds = %entry |
| 29 | %retval1 = load i32* %retval ; <i32> [#uses=1] |
| 30 | ret i32 %retval1 |
| 31 | } |