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8e5f112464
Summary: Inline asm memory constraints can have the base or index register be assigned to %r0 right now. Make sure that we assign only ADDR64 registers to the base and index. Reviewers: uweigand Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D23367 llvm-svn: 279157
86 lines
2.1 KiB
LLVM
86 lines
2.1 KiB
LLVM
; Test the "R" asm constraint, which accepts addresses that have a base,
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; an index and a 12-bit displacement.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -no-integrated-as | FileCheck %s
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; Check the lowest range.
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define void @f1(i64 %base) {
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; CHECK-LABEL: f1:
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; CHECK: blah 0(%r2)
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; CHECK: br %r14
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%addr = inttoptr i64 %base to i64 *
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call void asm "blah $0", "=*R" (i64 *%addr)
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ret void
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}
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; Check the next lowest byte.
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define void @f2(i64 %base) {
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; CHECK-LABEL: f2:
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; CHECK: aghi %r2, -1
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; CHECK: blah 0(%r2)
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; CHECK: br %r14
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%add = add i64 %base, -1
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%addr = inttoptr i64 %add to i64 *
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call void asm "blah $0", "=*R" (i64 *%addr)
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ret void
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}
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; Check the highest range.
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define void @f3(i64 %base) {
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; CHECK-LABEL: f3:
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; CHECK: blah 4095(%r2)
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; CHECK: br %r14
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%add = add i64 %base, 4095
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%addr = inttoptr i64 %add to i64 *
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call void asm "blah $0", "=*R" (i64 *%addr)
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ret void
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}
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; Check the next highest byte.
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define void @f4(i64 %base) {
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; CHECK-LABEL: f4:
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; CHECK: aghi %r2, 4096
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; CHECK: blah 0(%r2)
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; CHECK: br %r14
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%add = add i64 %base, 4096
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%addr = inttoptr i64 %add to i64 *
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call void asm "blah $0", "=*R" (i64 *%addr)
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ret void
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}
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; Check that indices are allowed
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define void @f5(i64 %base, i64 %index) {
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; CHECK-LABEL: f5:
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; CHECK: blah 0(%r3,%r2)
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; CHECK: br %r14
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%add = add i64 %base, %index
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%addr = inttoptr i64 %add to i64 *
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call void asm "blah $0", "=*R" (i64 *%addr)
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ret void
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}
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; Check that indices and displacements are allowed simultaneously
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define void @f6(i64 %base, i64 %index) {
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; CHECK-LABEL: f6:
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; CHECK: blah 4095(%r3,%r2)
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; CHECK: br %r14
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%add = add i64 %base, 4095
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%addi = add i64 %add, %index
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%addr = inttoptr i64 %addi to i64 *
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call void asm "blah $0", "=*R" (i64 *%addr)
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ret void
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}
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; Check that LAY is used if there is an index but the displacement is too large
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define void @f7(i64 %base, i64 %index) {
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; CHECK-LABEL: f7:
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; CHECK: lay %r1, 4096(%r3,%r2)
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; CHECK: blah 0(%r1)
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; CHECK: br %r14
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%add = add i64 %base, 4096
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%addi = add i64 %add, %index
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%addr = inttoptr i64 %addi to i64 *
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call void asm "blah $0", "=*R" (i64 *%addr)
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ret void
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}
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