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llvm-project/llvm/test/CodeGen/Thumb/large-stack.ll

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Fix more places which should be checking for iOS, not darwin. llvm-svn: 147513
2012-01-04 09:55:04 +08:00
; RUN: llc < %s -mtriple=thumb-apple-ios | FileCheck %s
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
define void @test1() {
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test1:
Re-apply r110655 with fixes. Epilogue must restore sp from fp if the function stack frame has a var-sized object. Also added a test case to check for the added benefit of this patch: it's optimizing away the unnecessary restore of sp from fp for some non-leaf functions. llvm-svn: 110707
2010-08-11 03:30:19 +08:00
; CHECK: sub sp, #256
; CHECK: add sp, #256
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
%tmp = alloca [ 64 x i32 ] , align 4
ret void
}
define void @test2() {
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test2:
This adds range checking for "ldr Rn, [pc, #imm]" Thumb instructions. With this patch: 1. ldr.n is recognized as mnemonic for the short encoding 2. ldr.w is recognized as menmonic for the long encoding 3. ldr will map to either short or long encodings depending on the size of the offset llvm-svn: 186831
2013-07-22 23:49:36 +08:00
; CHECK: ldr r0, LCPI
Re-apply r110655 with fixes. Epilogue must restore sp from fp if the function stack frame has a var-sized object. Also added a test case to check for the added benefit of this patch: it's optimizing away the unnecessary restore of sp from fp for some non-leaf functions. llvm-svn: 110707
2010-08-11 03:30:19 +08:00
; CHECK: add sp, r0
Fix epilogue codegen to avoid leaving the stack pointer in an invalid state. Previously Thumb2 would restore sp from fp like this: mov sp, r7 sub, sp, #4 If an interrupt is taken after the 'mov' but before the 'sub', callee-saved registers might be clobbered by the interrupt handler. Instead, try restoring directly from sp: add sp, #4 Or, if necessary (with VLA, etc.) use a scratch register to compute sp and then restore it: sub.w r4, r7, #8 mov sp, r7 rdar://8465407 llvm-svn: 119977
2010-11-23 02:12:04 +08:00
; CHECK: subs r4, r7, #4
; CHECK: mov sp, r4
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
%tmp = alloca [ 4168 x i8 ] , align 4
ret void
}
define i32 @test3() {
Convert CodeGen/*/*.ll tests to use the new CHECK-LABEL for easier debugging. No functionality change and all tests pass after conversion. This was done with the following sed invocation to catch label lines demarking function boundaries: sed -i '' "s/^;\( *\)\([A-Z0-9_]*\):\( *\)test\([A-Za-z0-9_-]*\):\( *\)$/;\1\2-LABEL:\3test\4:\5/g" test/CodeGen/*/*.ll which was written conservatively to avoid false positives rather than false negatives. I scanned through all the changes and everything looks correct. llvm-svn: 186258
2013-07-14 04:38:47 +08:00
; CHECK-LABEL: test3:
This adds range checking for "ldr Rn, [pc, #imm]" Thumb instructions. With this patch: 1. ldr.n is recognized as mnemonic for the short encoding 2. ldr.w is recognized as menmonic for the long encoding 3. ldr will map to either short or long encodings depending on the size of the offset llvm-svn: 186831
2013-07-22 23:49:36 +08:00
; CHECK: ldr r1, LCPI
LocalStackSlotAllocation improvements First, taking advantage of the fact that the virtual base registers are allocated in order of the local frame offsets, remove the quadratic register-searching behavior. Because of the ordering, we only need to check the last virtual base register created. Second, store the frame index in the FrameRef structure, and get the frame index and the local offset from this structure at the top of the loop iteration. This allows us to de-nest the loops in insertFrameReferenceRegisters (and I think makes the code cleaner). I also moved the needsFrameBaseReg check into the first loop over instructions so that we don't bother pushing FrameRefs for instructions that don't want a virtual base register anyway. Lastly, and this is the only functionality change, avoid the creation of single-use virtual base registers. These are currently not useful because, in general, they end up replacing what would be one r+r instruction with an add and a r+i instruction. Committing this removes the XFAIL in CodeGen/PowerPC/2007-09-07-LoadStoreIdxForms.ll Jim has okayed this off-list. llvm-svn: 180799
2013-05-01 04:04:37 +08:00
; CHECK: add sp, r1
This adds range checking for "ldr Rn, [pc, #imm]" Thumb instructions. With this patch: 1. ldr.n is recognized as mnemonic for the short encoding 2. ldr.w is recognized as menmonic for the long encoding 3. ldr will map to either short or long encodings depending on the size of the offset llvm-svn: 186831
2013-07-22 23:49:36 +08:00
; CHECK: ldr r1, LCPI
Re-apply r110655 with fixes. Epilogue must restore sp from fp if the function stack frame has a var-sized object. Also added a test case to check for the added benefit of this patch: it's optimizing away the unnecessary restore of sp from fp for some non-leaf functions. llvm-svn: 110707
2010-08-11 03:30:19 +08:00
; CHECK: add r1, sp
Fix epilogue codegen to avoid leaving the stack pointer in an invalid state. Previously Thumb2 would restore sp from fp like this: mov sp, r7 sub, sp, #4 If an interrupt is taken after the 'mov' but before the 'sub', callee-saved registers might be clobbered by the interrupt handler. Instead, try restoring directly from sp: add sp, #4 Or, if necessary (with VLA, etc.) use a scratch register to compute sp and then restore it: sub.w r4, r7, #8 mov sp, r7 rdar://8465407 llvm-svn: 119977
2010-11-23 02:12:04 +08:00
; CHECK: subs r4, r7, #4
; CHECK: mov sp, r4
Re-apply r110655 with fixes. Epilogue must restore sp from fp if the function stack frame has a var-sized object. Also added a test case to check for the added benefit of this patch: it's optimizing away the unnecessary restore of sp from fp for some non-leaf functions. llvm-svn: 110707
2010-08-11 03:30:19 +08:00
%retval = alloca i32, align 4
%tmp = alloca i32, align 4
%a = alloca [805306369 x i8], align 16
store i32 0, i32* %tmp
%tmp1 = load i32* %tmp
ret i32 %tmp1
Move thumb and thumb2 tests into separate directories. llvm-svn: 74068
2009-06-24 14:36:07 +08:00
}
[Thumb] Fix crash in Thumb1RegisterInfo::rewriteFrameIndex This function can, for some offsets from the SP, split one instruction into two. Since it re-uses the original instruction as the first instruction of the result, we need ensure its result register is not marked as dead before we use it in the second instruction. llvm-svn: 220194
2014-10-20 19:00:18 +08:00
; Here, the adds get optimized out because they are dead, but the calculation
; of the address of stack_a is dead but not optimized out. When the address
; calculation gets expanded to two instructions, we need to avoid reading a
; dead register.
; No CHECK lines (just test for crashes), as we hope this will be optimised
; better in future.
define i32 @test4() {
entry:
%stack_a = alloca i8, align 1
%stack_b = alloca [256 x i32*], align 4
%int = ptrtoint i8* %stack_a to i32
%add = add i32 %int, 1
br label %block2
block2:
%add2 = add i32 %add, 1
ret i32 0
}