Bill Wendling e9bf7e692e Handle code gen for the unreachable instruction if it's the only instruction in ... the function. We'll just turn it into a "trap" instruction instead. The problem with not handling this is that it might generate a prologue without the equivalent epilogue to go with it: $ cat t.ll define void @foo() { entry: unreachable } $ llc -o - t.ll -relocation-model=pic -disable-fp-elim -unwind-tables .section __TEXT,__text,regular,pure_instructions .globl _foo .align 4, 0x90 _foo: ## @foo Leh_func_begin0: ## BB#0: ## %entry pushq %rbp Ltmp0: movq %rsp, %rbp Ltmp1: Leh_func_end0: ... The unwind tables then have bad data in them causing all sorts of problems. Fixes <rdar://problem/8096481>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108473 91177308-0d34-0410-b5e6-96231b3b80d8		2010-07-15 23:32:40 +00:00
..
Alpha
ARM	Split -enable-finite-only-fp-math to two options:	2010-07-15 22:07:12 +00:00
Blackfin	Remove TargetInstrInfo::copyRegToReg entirely.	2010-07-11 17:01:17 +00:00
CBackend
CellSPU	Fix some tests that didn't test anything.	2010-06-26 20:05:06 +00:00
CPP
Generic	Fix up -fstack-protector on linux to use the segment	2010-07-06 05:18:56 +00:00
MBlaze
Mips
MSP430
PIC16
PowerPC	Handle code gen for the unreachable instruction if it's the only instruction in	2010-07-15 23:32:40 +00:00
SPARC
SystemZ
Thumb	Propagate the AlignStack bit in InlineAsm's to the	2010-07-02 20:16:09 +00:00
Thumb2	Improve 64-subtraction of immediates when parts of the immediate can fit	2010-07-14 17:45:16 +00:00
X86	Handle code gen for the unreachable instruction if it's the only instruction in	2010-07-15 23:32:40 +00:00
XCore