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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-02-24 22:43:17 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-02-24 22:43:17 +0000 |
| commit | 657baec0af38d84e24e4738b0696bb99d1517179 (patch) | |
| tree | d1d4d53bc522565a0194ca3263215f92492504e5 /test | |
| parent | 9792de7363973f30dfcbe71cc5f86b11168262b6 (diff) | |
| download | llvm-657baec0af38d84e24e4738b0696bb99d1517179.tar.gz llvm-657baec0af38d84e24e4738b0696bb99d1517179.tar.bz2 llvm-657baec0af38d84e24e4738b0696bb99d1517179.tar.xz | |
Create a stack frame on ARM when
- Function uses all scratch registers AND
- Function does not use any callee saved registers AND
- Stack size is too big to address with immediate offsets.
In this case a register must be scavenged to calculate the address of a stack
object, and the scavenger needs a spare register or emergency spill slot.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97071 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/Thumb2/2010-02-24-BigStack.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/CodeGen/Thumb2/2010-02-24-BigStack.ll b/test/CodeGen/Thumb2/2010-02-24-BigStack.ll new file mode 100644 index 0000000000..533546bb19 --- /dev/null +++ b/test/CodeGen/Thumb2/2010-02-24-BigStack.ll @@ -0,0 +1,15 @@ +; RUN: llc < %s -O0 -relocation-model=pic -disable-fp-elim -mcpu=cortex-a8 -mattr=+vfp2 +; This test creates a big stack frame without spilling any callee-saved registers. +; Make sure the whole stack frame is addrerssable wiothout scavenger crashes. +target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32" +target triple = "thumbv7-apple-darwin3.0.0-iphoneos" + +define arm_apcscc void @FindMin(double* %panelTDEL, i8* %dclOfRow, i32 %numRows, i32 %numCols, double* %retMin_RES_TDEL) { +entry: + %panelTDEL.addr = alloca double*, align 4 ; <double**> [#uses=1] + %panelResTDEL = alloca [2560 x double], align 4 ; <[2560 x double]*> [#uses=0] + store double* %panelTDEL, double** %panelTDEL.addr + store double* %retMin_RES_TDEL, double** undef + store i32 0, i32* undef + unreachable +} |