136 lines
3.6 KiB
Plaintext
136 lines
3.6 KiB
Plaintext
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# RUN: llc -mtriple=x86_64-- -run-pass branch-folder -O3 -o - %s | FileCheck %s
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---
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name: test1a
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body: |
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; CHECK-LABEL: name: test1a
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; CHECK: bb.0:
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; CHECK: TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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; CHECK: JCC_1 %bb.2, 5, implicit $eflags
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x80000000)
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; CHECK: MOV8mi $r12, 1, $noreg, 0, $noreg, 0
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; CHECK-NOT: RET
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; CHECK: bb.2:
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; CHECK: MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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; CHECK: RET 0
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bb.0:
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TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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JCC_1 %bb.2, 5, implicit killed $eflags
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bb.1:
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MOV8mi $r12, 1, $noreg, 0, $noreg, 0
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MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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RET 0
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bb.2:
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MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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RET 0
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...
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---
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name: test1b
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body: |
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; Verify that we get the same rewrites as in test1a when adding some
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; DBG_VALUE instructions in the mix.
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;
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; CHECK-LABEL: name: test1b
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; CHECK: bb.0:
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; CHECK: TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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; CHECK: JCC_1 %bb.2, 5, implicit $eflags
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x80000000)
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; CHECK: MOV8mi $r12, 1, $noreg, 0, $noreg, 0
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; CHECK-NOT: RET
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; CHECK: bb.2:
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; CHECK: DBG_VALUE
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; CHECK: DBG_VALUE
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; CHECK: MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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; CHECK: RET 0
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bb.0:
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TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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JCC_1 %bb.2, 5, implicit killed $eflags
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bb.1:
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MOV8mi $r12, 1, $noreg, 0, $noreg, 0
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MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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RET 0
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bb.2:
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DBG_VALUE
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DBG_VALUE
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MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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RET 0
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...
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---
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name: test2a
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body: |
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; CFI instruction currently prevents the rewrite here (although technically
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; I suppose that branch folding could let bb.1 fallthrough into bb.2 here).
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;
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; CHECK-LABEL: name: test2a
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; CHECK: bb.0:
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; CHECK: TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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; CHECK: JCC_1 %bb.2, 5, implicit killed $eflags
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; CHECK: bb.1:
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; CHECK: MOV8mi $r12, 1, $noreg, 0, $noreg, 0
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; CHECK: MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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; CHECK: RET 0
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; CHECK: bb.2:
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; CHECK: CFI_INSTRUCTION def_cfa_offset 8
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; CHECK: MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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; CHECK: RET 0
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bb.0:
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TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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JCC_1 %bb.2, 5, implicit killed $eflags
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bb.1:
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MOV8mi $r12, 1, $noreg, 0, $noreg, 0
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MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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RET 0
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bb.2:
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CFI_INSTRUCTION def_cfa_offset 8
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MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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RET 0
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...
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---
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name: test2b
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body: |
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; Verify that we get the same rewrites as in test1a when adding some
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; DBG_VALUE instructions in the mix.
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;
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; CHECK-LABEL: name: test2b
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; CHECK: bb.0:
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; CHECK: TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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; CHECK: JCC_1 %bb.2, 5, implicit killed $eflags
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; CHECK: bb.1:
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; CHECK: MOV8mi $r12, 1, $noreg, 0, $noreg, 0
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; CHECK: MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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; CHECK: RET 0
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; CHECK: bb.2:
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; CHECK: DBG_VALUE
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; CHECK: CFI_INSTRUCTION def_cfa_offset 8
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; CHECK: DBG_VALUE
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; CHECK: MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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; CHECK: RET 0
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bb.0:
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TEST8rr killed renamable $al, renamable $al, implicit-def $eflags
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JCC_1 %bb.2, 5, implicit killed $eflags
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bb.1:
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MOV8mi $r12, 1, $noreg, 0, $noreg, 0
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MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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RET 0
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bb.2:
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DBG_VALUE
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CFI_INSTRUCTION def_cfa_offset 8
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DBG_VALUE
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MOV8mi $r13, 1, $noreg, 0, $noreg, 0
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RET 0
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...
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