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| # RUN: llc -mtriple powerpc64-unknown-linux-gnu -run-pass livevars -run-pass phi-node-elimination -verify-machineinstrs -o - %s | FileCheck %s
# This test case was originally known as
# test/CodeGen/PowerPC/2013-07-01-PHIElimBug.ll
#
# It was discovered that the original test case no longer reproduced the bug
# from PR16508 (solved in rL185363). That could have been resolved by adding
# -O1 (or possibly -O0) to the run line, but instead the test case was
# converted into this .mir test case. Having it as a .mir test should make it
# less sensitive to changes in earlier passes.
--- |
target datalayout = "E-m:e-i64:64-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
@g_51 = external global [8 x i32], align 4
define void @func_7() {
bb.0:
ret void
}
...
---
name: func_7
tracksRegLiveness: true
body: |
bb.0:
liveins: $x2
%0:g8rc_and_g8rc_nox0 = ADDIStocHA8 $x2, @g_51
%1:g8rc_and_g8rc_nox0 = LDtocL @g_51, killed %0, implicit $x2 :: (load 8)
%2:gprc = LI 0
%3:crrc = CMPLWI killed %2, 0
BCC 76, killed %3, %bb.2
bb.1:
%4:g8rc = ADDI8 killed %1, 24
B %bb.4
bb.2:
%5:g8rc = ADDI8 killed %1, 24
%6:g8rc = LI8 0
%7:crrc = CMPLWI undef %8:gprc, 20
bb.3:
%9:g8rc = PHI %5, %bb.2, %10, %bb.3
%10:g8rc = PHI %6, %bb.2, undef %11:g8rc, %bb.3
BCC 68, %7, %bb.3
B %bb.4
bb.4:
%12:g8rc_and_g8rc_nox0 = PHI %4, %bb.1, %9, %bb.3
%13:g8rc = LI8 0
STW8 killed %13, 0, killed %12 :: (store 4)
BLR8 implicit $lr8, implicit $rm
...
# Original TR (and 2013-07-01-PHIElimBug.ll) was about verifier errors for bb.3.
#
# I got a feeling that we also need to have some checks to see that # the code
# is correct in some way. Hopefully this test case is stable enough to verify
# the full MIR like this.
#
# CHECK: bb.0:
# CHECK: %0:g8rc_and_g8rc_nox0 = ADDIStocHA8 $x2, @g_51
# CHECK-NEXT: %1:g8rc_and_g8rc_nox0 = LDtocL @g_51, killed %0, implicit killed $x2 :: (load 8)
# CHECK-NEXT: %2:gprc = LI 0
# CHECK-NEXT: %3:crrc = CMPLWI killed %2, 0
# CHECK-NEXT: BCC 76, killed %3, %bb.2
# CHECK: bb.1:
# CHECK: %4:g8rc = ADDI8 killed %1, 24
# CHECK-NEXT: %16:g8rc_and_g8rc_nox0 = COPY killed %4
# CHECK-NEXT: B %bb.4
# CHECK: bb.2:
# CHECK: %5:g8rc = ADDI8 killed %1, 24
# CHECK-NEXT: %6:g8rc = LI8 0
# CHECK-NEXT: %7:crrc = CMPLWI undef %8:gprc, 20
# CHECK-NEXT: %14:g8rc = COPY killed %5
# CHECK-NEXT: %15:g8rc = COPY killed %6
# CHECK: bb.3:
# CHECK: %10:g8rc = COPY killed %15
# CHECK-NEXT: %9:g8rc = COPY killed %14
# CHECK-NEXT: %14:g8rc = COPY killed %10
# CHECK-NEXT: %15:g8rc = IMPLICIT_DEF
# CHECK-NEXT: %16:g8rc_and_g8rc_nox0 = COPY killed %9
# CHECK-NEXT: BCC 68, %7, %bb.3
# CHECK-NEXT: B %bb.4
# CHECK: bb.4:
# CHECK: %12:g8rc_and_g8rc_nox0 = COPY killed %16
# CHECK-NEXT: %13:g8rc = LI8 0
# CHECK-NEXT: STW8 killed %13, 0, killed %12 :: (store 4)
# CHECK-NEXT: BLR8 implicit $lr8, implicit $rm
|