128 lines
4.1 KiB
Plaintext
128 lines
4.1 KiB
Plaintext
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# RUN: llc -mtriple powerpc64le-unknown-linux-gnu %s -o - 2>&1 \
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# RUN: -run-pass=livevars,phi-node-elimination -verify-machineinstrs | \
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# RUN: FileCheck %s
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--- |
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; Function Attrs: noreturn nounwind
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define signext i32 @zext_free(i8** nocapture dereferenceable(8) %p) {
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entry:
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%.pre = load i8*, i8** %p, align 8
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br label %loop
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loop: ; preds = %loop, %if.then3, %entry
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%0 = phi i8* [ %.pre, %entry ], [ %incdec.ptr4, %if.then3 ], [ %incdec.ptr, %loop ]
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%1 = load i8, i8* %0, align 1
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%tobool = icmp eq i8 %1, 0
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%incdec.ptr = getelementptr inbounds i8, i8* %0, i64 1
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store i8* %incdec.ptr, i8** %p, align 8
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%2 = load i8, i8* %incdec.ptr, align 1
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%tobool2 = icmp ne i8 %2, 0
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%or.cond = and i1 %tobool, %tobool2
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br i1 %or.cond, label %if.then3, label %loop
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if.then3: ; preds = %loop
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%incdec.ptr4 = getelementptr inbounds i8, i8* %0, i64 2
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store i8* %incdec.ptr4, i8** %p, align 8
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br label %loop
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}
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...
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---
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name: zext_free
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tracksRegLiveness: true
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registers:
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- { id: 0, class: g8rc, preferred-register: '' }
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- { id: 1, class: g8rc_and_g8rc_nox0, preferred-register: '' }
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- { id: 2, class: g8rc, preferred-register: '' }
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- { id: 3, class: g8rc, preferred-register: '' }
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- { id: 4, class: g8rc_and_g8rc_nox0, preferred-register: '' }
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- { id: 5, class: gprc, preferred-register: '' }
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- { id: 6, class: crrc, preferred-register: '' }
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- { id: 7, class: crbitrc, preferred-register: '' }
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- { id: 8, class: gprc, preferred-register: '' }
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- { id: 9, class: crrc, preferred-register: '' }
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- { id: 10, class: crbitrc, preferred-register: '' }
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- { id: 11, class: crbitrc, preferred-register: '' }
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liveins:
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- { reg: '$x3', virtual-reg: '%4' }
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body: |
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bb.0.entry:
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successors: %bb.1(0x80000000)
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liveins: $x3
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%4:g8rc_and_g8rc_nox0 = COPY killed $x3
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%0:g8rc = LD 0, %4 :: (dereferenceable load 8 from %ir.p)
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bb.1.loop:
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successors: %bb.1(0x20000000), %bb.2(0x60000000)
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%1:g8rc_and_g8rc_nox0 = PHI %0, %bb.0, %2, %bb.1, %3, %bb.3, %2, %bb.2
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%5:gprc = LBZ 0, %1 :: (load 1 from %ir.0)
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%6:crrc = CMPWI killed %5, 0
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%7:crbitrc = COPY killed %6.sub_eq
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%2:g8rc = nuw ADDI8 %1, 1
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STD %2, 0, %4 :: (store 8 into %ir.p)
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%8:gprc = LBZ 1, %1 :: (load 1 from %ir.incdec.ptr)
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BCn killed %7, %bb.1
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B %bb.2
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bb.2.loop:
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successors: %bb.3(0x55555555), %bb.1(0x2aaaaaab)
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%9:crrc = CMPWI killed %8, 0
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%10:crbitrc = COPY killed %9.sub_eq
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BC killed %10, %bb.1
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B %bb.3
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bb.3.if.then3:
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successors: %bb.1(0x80000000)
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%3:g8rc = nuw ADDI8 killed %1, 2
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STD %3, 0, %4 :: (store 8 into %ir.p)
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B %bb.1
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; CHECK-LABEL: name: zext_free
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; CHECK: bb.0.entry:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: liveins: $x3
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; CHECK: %4:g8rc_and_g8rc_nox0 = COPY killed $x3
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; CHECK: %0:g8rc = LD 0, %4 :: (dereferenceable load 8 from %ir.p)
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; CHECK: %12:g8rc_and_g8rc_nox0 = COPY killed %0
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; CHECK: bb.1.loop:
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; CHECK: successors: %bb.1(0x20000000), %bb.2(0x60000000)
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; CHECK: %1:g8rc_and_g8rc_nox0 = COPY killed %12
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; CHECK: %5:gprc = LBZ 0, %1 :: (load 1 from %ir.0)
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; CHECK: %6:crrc = CMPWI killed %5, 0
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; CHEXK: %7:crbitrc = COPY killed %6.sub_eq
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; CHECK: %2:g8rc = nuw ADDI8 %1, 1
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; CHECK: STD %2, 0, %4 :: (store 8 into %ir.p)
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; CHECK: %8:gprc = LBZ 1, %1 :: (load 1 from %ir.incdec.ptr)
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; CHECK: %12:g8rc_and_g8rc_nox0 = COPY %2
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; CHECK: BCn killed %7, %bb.1
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; CHECK: B %bb.2
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; CHECK: bb.2.loop:
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; CHECK: successors: %bb.3(0x55555555), %bb.1(0x2aaaaaab)
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; CHECK: %9:crrc = CMPWI killed %8, 0
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; CHECK: %10:crbitrc = COPY killed %9.sub_eq
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; CHECK: %12:g8rc_and_g8rc_nox0 = COPY killed %2
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; CHECK: BC killed %10, %bb.1
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; CHECK: B %bb.3
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; CHECK: bb.3.if.then3:
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; CHECK: successors: %bb.1(0x80000000)
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; CHECK: %3:g8rc = nuw ADDI8 killed %1, 2
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; CHECK: STD %3, 0, %4 :: (store 8 into %ir.p)
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; CHECK: %12:g8rc_and_g8rc_nox0 = COPY killed %3
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; CHECK: B %bb.1
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...
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