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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-16 21:29:40 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-16 21:29:40 +0000 |
| commit | c66d0f2a9386cc7cb3237b8e3cace2b62a9c7dc8 (patch) | |
| tree | adb71f8efe1ac115eb244f2d1900ecc52801fd23 /test | |
| parent | 08f55d02da2cd24f3b4297259ef6429b8bf1ef97 (diff) | |
| download | llvm-c66d0f2a9386cc7cb3237b8e3cace2b62a9c7dc8.tar.gz llvm-c66d0f2a9386cc7cb3237b8e3cace2b62a9c7dc8.tar.bz2 llvm-c66d0f2a9386cc7cb3237b8e3cace2b62a9c7dc8.tar.xz | |
Allow a register to be redefined multiple times in a basic block.
LiveVariableAnalysis was a bit picky about a register only being redefined once,
but that really isn't necessary.
Here is an example of chained INSERT_SUBREGs that we can handle now:
68 %reg1040<def> = INSERT_SUBREG %reg1040, %reg1028<kill>, 14
register: %reg1040 +[70,134:0)
76 %reg1040<def> = INSERT_SUBREG %reg1040, %reg1029<kill>, 13
register: %reg1040 replace range with [70,78:1) RESULT: %reg1040,0.000000e+00 = [70,78:1)[78,134:0) 0@78-(134) 1@70-(78)
84 %reg1040<def> = INSERT_SUBREG %reg1040, %reg1030<kill>, 12
register: %reg1040 replace range with [78,86:2) RESULT: %reg1040,0.000000e+00 = [70,78:1)[78,86:2)[86,134:0) 0@86-(134) 1@70-(78) 2@78-(86)
92 %reg1040<def> = INSERT_SUBREG %reg1040, %reg1031<kill>, 11
register: %reg1040 replace range with [86,94:3) RESULT: %reg1040,0.000000e+00 = [70,78:1)[78,86:2)[86,94:3)[94,134:0) 0@94-(134) 1@70-(78) 2@78-(86) 3@86-(94)
rdar://problem/8096390
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106152 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/Thumb2/crash.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/CodeGen/Thumb2/crash.ll b/test/CodeGen/Thumb2/crash.ll new file mode 100644 index 0000000000..19b1d25b1b --- /dev/null +++ b/test/CodeGen/Thumb2/crash.ll @@ -0,0 +1,21 @@ +; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a8 +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-darwin10" + +; This function would crash LiveIntervalAnalysis by creating a chain of 4 INSERT_SUBREGs of the same register. +define arm_apcscc void @NEON_vst4q_u32(i32* nocapture %sp0, i32* nocapture %sp1, i32* nocapture %sp2, i32* nocapture %sp3, i32* %dp) nounwind { +entry: + %0 = bitcast i32* %sp0 to <4 x i32>* ; <<4 x i32>*> [#uses=1] + %1 = load <4 x i32>* %0, align 16 ; <<4 x i32>> [#uses=1] + %2 = bitcast i32* %sp1 to <4 x i32>* ; <<4 x i32>*> [#uses=1] + %3 = load <4 x i32>* %2, align 16 ; <<4 x i32>> [#uses=1] + %4 = bitcast i32* %sp2 to <4 x i32>* ; <<4 x i32>*> [#uses=1] + %5 = load <4 x i32>* %4, align 16 ; <<4 x i32>> [#uses=1] + %6 = bitcast i32* %sp3 to <4 x i32>* ; <<4 x i32>*> [#uses=1] + %7 = load <4 x i32>* %6, align 16 ; <<4 x i32>> [#uses=1] + %8 = bitcast i32* %dp to i8* ; <i8*> [#uses=1] + tail call void @llvm.arm.neon.vst4.v4i32(i8* %8, <4 x i32> %1, <4 x i32> %3, <4 x i32> %5, <4 x i32> %7) + ret void +} + +declare void @llvm.arm.neon.vst4.v4i32(i8*, <4 x i32>, <4 x i32>, <4 x i32>, <4 x i32>) nounwind |