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Diffstat (limited to 'test/CodeGen/ARM/2013-10-11-select-stalls.ll')
| -rw-r--r-- | test/CodeGen/ARM/2013-10-11-select-stalls.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/2013-10-11-select-stalls.ll b/test/CodeGen/ARM/2013-10-11-select-stalls.ll new file mode 100644 index 0000000..33c0587 --- /dev/null +++ b/test/CodeGen/ARM/2013-10-11-select-stalls.ll @@ -0,0 +1,16 @@ +; REQUIRES: asserts +; RUN: llc < %s -mtriple=thumbv7-apple-ios -stats 2>&1 | not grep "Number of pipeline stalls" +; Evaluate the two vld1.8 instructions in separate MBB's, +; instead of stalling on one and conditionally overwriting its result. + +define <16 x i8> @multiselect(i32 %avail, i8* %foo, i8* %bar) { +entry: + %vld1 = call <16 x i8> @llvm.arm.neon.vld1.v16i8(i8* %foo, i32 1) + %vld2 = call <16 x i8> @llvm.arm.neon.vld1.v16i8(i8* %bar, i32 1) + %and = and i32 %avail, 1 + %tobool = icmp eq i32 %and, 0 + %retv = select i1 %tobool, <16 x i8> %vld1, <16 x i8> %vld2 + ret <16 x i8> %retv +} + +declare <16 x i8> @llvm.arm.neon.vld1.v16i8(i8* , i32 ) |