| ; RUN: llc -march=ppc64 -mtriple=powerpc64-apple-darwin < %s | FileCheck %s |
| ; Check that the peephole optimizer knows about sext and zext instructions. |
| ; CHECK: test1sext |
| define i32 @test1sext(i64 %A, i64 %B, i32* %P, i64 *%P2) nounwind { |
| %C = add i64 %A, %B |
| ; CHECK: add [[SUM:r[0-9]+]], r3, r4 |
| %D = trunc i64 %C to i32 |
| %E = shl i64 %C, 32 |
| %F = ashr i64 %E, 32 |
| ; CHECK: extsw [[EXT:r[0-9]+]], [[SUM]] |
| store volatile i64 %F, i64 *%P2 |
| ; CHECK: std [[EXT]] |
| store volatile i32 %D, i32* %P |
| ; Reuse low bits of extended register, don't extend live range of SUM. |
| ; CHECK: stw [[EXT]] |
| %R = add i32 %D, %D |
| ret i32 %R |
| } |
