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| author | Chris Lattner <sabre@nondot.org> | 2009-09-20 17:37:38 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-09-20 17:37:38 +0000 |
| commit | 7acce9445f10d7ddea1480a477473ce0ca92a1b0 (patch) | |
| tree | 28bf0d81a216b3fe58d572ecf7f6265725c2bd21 /lib/Target | |
| parent | 9c220f60be3a50de7fd2a5c491ccfa63c5d3a342 (diff) | |
| download | external_llvm-7acce9445f10d7ddea1480a477473ce0ca92a1b0.zip external_llvm-7acce9445f10d7ddea1480a477473ce0ca92a1b0.tar.gz external_llvm-7acce9445f10d7ddea1480a477473ce0ca92a1b0.tar.bz2 | |
update an entry, delete an entry which has been fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82398 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/README.txt | 51 |
1 files changed, 15 insertions, 36 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index f180c2e..b44c5fa 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -337,24 +337,22 @@ void foo(int N) { for (i = 0; i < N; i++) { X = i; Y = i*4; } } -produces two identical IV's (after promotion) on PPC/ARM: +produces two near identical IV's (after promotion) on PPC/ARM: -LBB1_1: @bb.preheader - mov r3, #0 - mov r2, r3 - mov r1, r3 -LBB1_2: @bb - ldr r12, LCPI1_0 - ldr r12, [r12] - strh r2, [r12] - ldr r12, LCPI1_1 - ldr r12, [r12] - strh r3, [r12] - add r1, r1, #1 <- [0,+,1] - add r3, r3, #4 - add r2, r2, #1 <- [0,+,1] - cmp r1, r0 - bne LBB1_2 @bb +LBB1_2: + ldr r3, LCPI1_0 + ldr r3, [r3] + strh r2, [r3] + ldr r3, LCPI1_1 + ldr r3, [r3] + strh r1, [r3] + add r1, r1, #4 + add r2, r2, #1 <- [0,+,1] + sub r0, r0, #1 <- [0,-,1] + cmp r0, #0 + bne LBB1_2 + +LSR should reuse the "+" IV for the exit test. //===---------------------------------------------------------------------===// @@ -588,25 +586,6 @@ implementations of ceil/floor/rint. //===---------------------------------------------------------------------===// -This GCC bug: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34043 -contains a testcase that compiles down to: - - %struct.XMM128 = type { <4 x float> } -.. - %src = alloca %struct.XMM128 -.. - %tmp6263 = bitcast %struct.XMM128* %src to <2 x i64>* - %tmp65 = getelementptr %struct.XMM128* %src, i32 0, i32 0 - store <2 x i64> %tmp5899, <2 x i64>* %tmp6263, align 16 - %tmp66 = load <4 x float>* %tmp65, align 16 - %tmp71 = add <4 x float> %tmp66, %tmp66 - -If the mid-level optimizer turned the bitcast of pointer + store of tmp5899 -into a bitcast of the vector value and a store to the pointer, then the -store->load could be easily removed. - -//===---------------------------------------------------------------------===// - Consider: int test() { |