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Diffstat (limited to 'test/CodeGen/ARM/copy-cpsr.ll')
| -rw-r--r-- | test/CodeGen/ARM/copy-cpsr.ll | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/test/CodeGen/ARM/copy-cpsr.ll b/test/CodeGen/ARM/copy-cpsr.ll deleted file mode 100644 index 8b7dc038fc92..000000000000 --- a/test/CodeGen/ARM/copy-cpsr.ll +++ /dev/null @@ -1,41 +0,0 @@ -; RUN: llc -mtriple=armv7s-apple-ios7.0 -show-mc-encoding %s -o - | FileCheck %s --check-prefix=CHECK-ARM -; RUN: llc -mtriple=thumbv7s-apple-ios7.0 -show-mc-encoding %s -o - | FileCheck %s --check-prefix=CHECK-THUMB -; RUN: llc -mtriple=thumbv7m-none-eabi -show-mc-encoding %s -o - | FileCheck %s --check-prefix=CHECK-THUMB - -; In the ARM backend, most compares are glued to their uses so CPSR can't -; escape. However, for long ADCS chains (and last ditch fallback) the dependency -; is carried in the DAG because duplicating them can be more expensive than -; copying CPSR. - -; Crafting a test for this was a little tricky, in case it breaks here are some -; notes on what I was tring to achieve: -; + We want 2 long ADCS chains -; + We want them to split after an initial common prefix (so that a single -; CPSR is used twice). -; + We want both chains to write CPSR post-split (so that the copy can't be -; elided). -; + We want the chains to be long enough that duplicating them is expensive. - -define void @test_copy_cpsr(i128 %lhs, i128 %rhs, i128* %addr) { -; CHECK-ARM: test_copy_cpsr: -; CHECK-THUMB: test_copy_cpsr: - -; CHECK-ARM: mrs [[TMP:r[0-9]+]], apsr @ encoding: [0x00,0x{{[0-9a-f]}}0,0x0f,0xe1] -; CHECK-ARM: msr APSR_nzcvq, [[TMP]] @ encoding: [0x0{{[0-9a-f]}},0xf0,0x28,0xe1] - - ; In Thumb mode v7M and v7AR have different MRS/MSR instructions that happen - ; to overlap for the apsr case, so it's definitely worth checking both. -; CHECK-THUMB: mrs [[TMP:r[0-9]+]], apsr @ encoding: [0xef,0xf3,0x00,0x8{{[0-9a-f]}}] -; CHECK-THUMB: msr {{APSR|apsr}}_nzcvq, [[TMP]] @ encoding: [0x8{{[0-9a-f]}},0xf3,0x00,0x88] - - %sum = add i128 %lhs, %rhs - store volatile i128 %sum, i128* %addr - - %rhs2.tmp1 = trunc i128 %rhs to i64 - %rhs2 = zext i64 %rhs2.tmp1 to i128 - - %sum2 = add i128 %lhs, %rhs2 - store volatile i128 %sum2, i128* %addr - - ret void -} |
