diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/ARM/fold-stack-adjust.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/fold-stack-adjust.ll b/test/CodeGen/ARM/fold-stack-adjust.ll index 8bda768..8c60bca 100644 --- a/test/CodeGen/ARM/fold-stack-adjust.ll +++ b/test/CodeGen/ARM/fold-stack-adjust.ll @@ -124,3 +124,32 @@ define arm_aapcs_vfpcc double @check_vfp_no_return_clobber() minsize { ret double 1.0 } + +@dbl = global double 0.0 + +; PR18136: there was a bug determining where the first eligible pop in a +; basic-block was when the entire block was epilogue code. +define void @test_fold_point(i1 %tst) minsize { +; CHECK-LABEL: test_fold_point: + + ; Important to check for beginning of basic block, because if it gets + ; if-converted the test is probably no longer checking what it should. +; CHECK: {{LBB[0-9]+_2}}: +; CHECK-NEXT: vpop {d7, d8} +; CHECK-NEXT: pop {r4, pc} + ; We want some memory so there's a stack adjustment to fold... + %var = alloca i8, i32 8 + + ; We want a long-lived floating register so that a callee-saved dN is used and + ; there's both a vpop and a pop. + %live_val = load double* @dbl + br i1 %tst, label %true, label %end +true: + call void @bar(i8* %var) + store double %live_val, double* @dbl + br label %end +end: + ; We want the epilogue to be the only thing in a basic block so that we hit + ; the correct edge-case (first inst in block is correct one to adjust). + ret void +}
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