46d5d264fc
The MI Peephole pass has grown to include a large number of transformations over the years. Many of the transformations require re-computation of kill flags but don't do a good job of re-computing them. This causes us to have very common failures when the compiler is built with expensive checks. Over time, we added and augmented a function that is supposed to go and fix up kill flags after each transformation but we keep missing cases. This patch does the following: - Removes the function to re-compute kill flags - Adds LiveVariables to compute and maintain kill flags while transforming code - Adds re-computation of kill flags for the post-RA peepholes for each block that contains a transformed instruction Reviewed By: stefanp Differential Revision: https://reviews.llvm.org/D133103
39 lines
939 B
YAML
39 lines
939 B
YAML
# RUN: llc -mtriple=powerpc64le-unknown-linux-gnu -verify-machineinstrs -start-before ppc-mi-peepholes \
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# RUN: -stop-after ppc-mi-peepholes %s -o - | FileCheck %s
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---
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name: test
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#CHECK : name : test
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $x3
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%0:g8rc = COPY $x3
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%1:gprc = COPY %0.sub_32:g8rc
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%2:g8rc = LI8 63
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bb.1:
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%3:gprc = COPY %2.sub_32:g8rc
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; CHECK: %4:gprc = LI 0
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%4:gprc = XORI killed %3:gprc, 63
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STW killed %4:gprc, %4:gprc, 100
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BLR8 implicit $lr8, implicit $rm
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...
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---
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name: test2
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#CHECK : name : test2
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $r3
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%0:gprc = COPY $r3
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%1:gprc_and_gprc_nor0 = LI 0
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; CHECK-NOT: COPY %1
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%2:gprc = COPY %1:gprc_and_gprc_nor0
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; CHECK: %3:gprc = LI 1
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%3:gprc = ORI killed %2:gprc, 1
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; CHECK: STW killed %3, killed %0, 100
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STW killed %3:gprc, %0:gprc, 100
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BLR8 implicit $lr8, implicit $rm
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...
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