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llvm-project/llvm/test/CodeGen/PowerPC/mcm-12.ll

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[PPC] Adjust some PowerPC tests to account for presence/absence of VSX Patch by Bill Seurer; committed on his behalf. These test cases generate slightly different code sequences when VSX is activated and thus fail. The update turns off VSX explicitly for the existing checks and then adds a second set of checks for most of them that test the VSX instruction output. llvm-svn: 220019
2014-10-17 09:41:22 +08:00
; RUN: llc -mcpu=pwr7 -O1 -code-model=medium -mattr=-vsx < %s | FileCheck %s
; RUN: llc -mcpu=pwr7 -O1 -code-model=medium -mattr=+vsx < %s | FileCheck -check-prefix=CHECK-VSX %s
PPCDAGToDAGISel::PostprocessISelDAG() This patch implements the PPCDAGToDAGISel::PostprocessISelDAG virtual method to perform post-selection peephole optimizations on the DAG representation. One optimization is implemented here: folds to clean up complex addressing expressions for thread-local storage and medium code model. It will also be useful for large code model sequences when those are added later. I originally thought about doing this on the MI representation prior to register assignment, but it's difficult to do effective global dead code elimination at that point. DCE is trivial on the DAG representation. A typical example of a candidate code sequence in assembly: addis 3, 2, globalvar@toc@ha addi 3, 3, globalvar@toc@l lwz 5, 0(3) When the final instruction is a load or store with an immediate offset of zero, the offset from the add-immediate can replace the zero, provided the relocation information is carried along: addis 3, 2, globalvar@toc@ha lwz 5, globalvar@toc@l(3) Since the addi can in general have multiple uses, we need to only delete the instruction when the last use is removed. llvm-svn: 175697
2013-02-21 08:38:25 +08:00
; Test peephole optimization for medium code model (32-bit TOC offsets)
; for loading a value from the constant pool (TOC-relative).
target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
define double @test_double_const() nounwind {
entry:
ret double 0x3F4FD4920B498CF0
}
; CHECK: [[VAR:[a-z0-9A-Z_.]+]]:
; CHECK: .quad 4562098671269285104
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: test_double_const:
PPCDAGToDAGISel::PostprocessISelDAG() This patch implements the PPCDAGToDAGISel::PostprocessISelDAG virtual method to perform post-selection peephole optimizations on the DAG representation. One optimization is implemented here: folds to clean up complex addressing expressions for thread-local storage and medium code model. It will also be useful for large code model sequences when those are added later. I originally thought about doing this on the MI representation prior to register assignment, but it's difficult to do effective global dead code elimination at that point. DCE is trivial on the DAG representation. A typical example of a candidate code sequence in assembly: addis 3, 2, globalvar@toc@ha addi 3, 3, globalvar@toc@l lwz 5, 0(3) When the final instruction is a load or store with an immediate offset of zero, the offset from the add-immediate can replace the zero, provided the relocation information is carried along: addis 3, 2, globalvar@toc@ha lwz 5, globalvar@toc@l(3) Since the addi can in general have multiple uses, we need to only delete the instruction when the last use is removed. llvm-svn: 175697
2013-02-21 08:38:25 +08:00
; CHECK: addis [[REG1:[0-9]+]], 2, [[VAR]]@toc@ha
; CHECK: lfd {{[0-9]+}}, [[VAR]]@toc@l([[REG1]])
[PPC] Adjust some PowerPC tests to account for presence/absence of VSX Patch by Bill Seurer; committed on his behalf. These test cases generate slightly different code sequences when VSX is activated and thus fail. The update turns off VSX explicitly for the existing checks and then adds a second set of checks for most of them that test the VSX instruction output. llvm-svn: 220019
2014-10-17 09:41:22 +08:00
; CHECK-VSX: [[VAR:[a-z0-9A-Z_.]+]]:
; CHECK-VSX: .quad 4562098671269285104
; CHECK-VSX-LABEL: test_double_const:
; CHECK-VSX: addis [[REG1:[0-9]+]], 2, [[VAR]]@toc@ha
; CHECK-VSX: addi [[REG1]], {{[0-9]+}}, [[VAR]]@toc@l
; CHECK-VSX: lxsdx {{[0-9]+}}, 0, [[REG1]]