diff options
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/ARM/call-tc.ll | 17 |
2 files changed, 18 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index fd77732364..008edbe4a7 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -2147,7 +2147,7 @@ bool ARMTargetLowering::isUsedByReturnOnly(SDNode *N, SDValue &Chain) const { Copy = *Copy->use_begin(); if (Copy->getOpcode() != ISD::CopyToReg || !Copy->hasNUsesOfValue(1, 0)) return false; - Chain = Copy->getOperand(0); + TCChain = Copy->getOperand(0); } else { return false; } diff --git a/test/CodeGen/ARM/call-tc.ll b/test/CodeGen/ARM/call-tc.ll index 58fbbda0f6..c7e17ea353 100644 --- a/test/CodeGen/ARM/call-tc.ll +++ b/test/CodeGen/ARM/call-tc.ll @@ -162,3 +162,20 @@ define i32 @t9() nounwind { declare %class.MutexLock* @_ZN9MutexLockC1Ev(%class.MutexLock*) unnamed_addr nounwind align 2 declare %class.MutexLock* @_ZN9MutexLockD1Ev(%class.MutexLock*) unnamed_addr nounwind align 2 + +; rdar://13827621 +; Correctly preserve the input chain for the tailcall node in the bitcast case, +; otherwise the call to floorf is lost. +define float @libcall_tc_test2(float* nocapture %a, float %b) { +; CHECKT2D: libcall_tc_test2: +; CHECKT2D: blx _floorf +; CHECKT2D: b.w _truncf + %1 = load float* %a, align 4 + %call = tail call float @floorf(float %1) + store float %call, float* %a, align 4 + %call1 = tail call float @truncf(float %b) + ret float %call1 +} + +declare float @floorf(float) readnone +declare float @truncf(float) readnone |