mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-01-03 13:31:05 +00:00
ea14085be5
Before the patch we took advantage of the fact that the compare and branch are glued together in the selection DAG and fused them together (where possible) while emitting them. This seemed to work well in practice. However, fusing the compare so early makes it harder to remove redundant compares in cases where CC already has a suitable value. This patch therefore uses the peephole analyzeCompare/optimizeCompareInstr pair of functions instead. No behavioral change intended, but it paves the way for a later patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187116 91177308-0d34-0410-b5e6-96231b3b80d8
184 lines
4.9 KiB
LLVM
184 lines
4.9 KiB
LLVM
; Test 32-bit signed comparison in which the second operand is a variable.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare i32 @foo()
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; Check register comparison.
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define double @f1(double %a, double %b, i32 %i1, i32 %i2) {
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; CHECK-LABEL: f1:
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; CHECK: crjl %r2, %r3
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the low end of the C range.
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define double @f2(double %a, double %b, i32 %i1, i32 *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK: c %r2, 0(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the high end of the aligned C range.
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define double @f3(double %a, double %b, i32 %i1, i32 *%base) {
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; CHECK-LABEL: f3:
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; CHECK: c %r2, 4092(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 1023
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the next word up, which should use CY instead of C.
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define double @f4(double %a, double %b, i32 %i1, i32 *%base) {
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; CHECK-LABEL: f4:
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; CHECK: cy %r2, 4096(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 1024
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the high end of the aligned CY range.
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define double @f5(double %a, double %b, i32 %i1, i32 *%base) {
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; CHECK-LABEL: f5:
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; CHECK: cy %r2, 524284(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 131071
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define double @f6(double %a, double %b, i32 %i1, i32 *%base) {
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; CHECK-LABEL: f6:
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; CHECK: agfi %r3, 524288
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; CHECK: c %r2, 0(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 131072
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the high end of the negative aligned CY range.
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define double @f7(double %a, double %b, i32 %i1, i32 *%base) {
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; CHECK-LABEL: f7:
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; CHECK: cy %r2, -4(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 -1
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the low end of the CY range.
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define double @f8(double %a, double %b, i32 %i1, i32 *%base) {
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; CHECK-LABEL: f8:
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; CHECK: cy %r2, -524288(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 -131072
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the next word down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define double @f9(double %a, double %b, i32 %i1, i32 *%base) {
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; CHECK-LABEL: f9:
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; CHECK: agfi %r3, -524292
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; CHECK: c %r2, 0(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 -131073
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check that C allows an index.
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define double @f10(double %a, double %b, i32 %i1, i64 %base, i64 %index) {
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; CHECK-LABEL: f10:
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; CHECK: c %r2, 4092({{%r4,%r3|%r3,%r4}})
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%add1 = add i64 %base, %index
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%add2 = add i64 %add1, 4092
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%ptr = inttoptr i64 %add2 to i32 *
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check that CY allows an index.
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define double @f11(double %a, double %b, i32 %i1, i64 %base, i64 %index) {
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; CHECK-LABEL: f11:
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; CHECK: cy %r2, 4096({{%r4,%r3|%r3,%r4}})
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%add1 = add i64 %base, %index
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%add2 = add i64 %add1, 4096
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%ptr = inttoptr i64 %add2 to i32 *
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%i2 = load i32 *%ptr
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%cond = icmp slt i32 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; The first branch here got recreated by InsertBranch while splitting the
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; critical edge %entry->%while.body, which lost the kills information for CC.
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define void @f12(i32 %a, i32 %b) {
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; CHECK-LABEL: f12:
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; CHECK: crje %r2,
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; CHECK: crjlh %r2,
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; CHECK: br %r14
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entry:
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%cmp11 = icmp eq i32 %a, %b
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br i1 %cmp11, label %while.end, label %while.body
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while.body:
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%c = call i32 @foo()
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%cmp12 = icmp eq i32 %c, %b
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br i1 %cmp12, label %while.end, label %while.body
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while.end:
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ret void
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}
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